The best bike locks for electric bikes are hardened steel U-locks that carry a Sold Secure Powered Cycle Diamond or ART 4 star rating, because a modern thief with an angle grinder does not care how good your cable lock is. Our top pick, the Kryptonite Evolution Mini-7 U-Lock with its 4 ft cable, is the one we recommend for most riders because it has the highest volume of real-world owner feedback in this roundup, while the Hiplok D1000 is the answer when your bike sleeps outside overnight in a high-theft area. Budget and location change the answer a lot, so keep reading to the end.
Electric bikes get stolen differently than bicycles. The frame is a commodity, the motor and controller are worth real money, and a removable battery can be half the purchase price on its own. Thieves know that, which is why the first thing they pull is the pack and the second thing they do is cut the frame lock with a disc cutter. A standard bike lock that shrugs off bolt cutters is no longer a sufficient answer for a machine worth several times more.
We spent six weeks putting these 12 locks through the routine that actually matters: locking and unlocking a fat-tire commuter hundreds of times, stuffing them into panniers and backpacks, checking the internal fitment against a wide-fork e-bike and a cargo bike, and reading owner reviews closely enough to spot the complaints that only show up after month three. We did not cut locks with power tools ourselves, so where we talk about grinder resistance we rely on the independent certification bodies and published third-party testing, and we say so plainly rather than repeating marketing language.
If you are still working out the basics of lock shapes and shackle sizes, our complete guide to U-locks for bikes covers the mechanical fundamentals, and our general bike lock guide covers what matters if your ride has no motor. Everything below assumes you already know what a U-lock is and want to know which one to strap to an expensive machine.
Top 3 Picks: Bike Locks for Electric Bikes in 2026
Kryptonite Evolution Mini-7 U-Lock
- 13mm hardened steel shackle
- Sold Secure Gold certified
- 3.25 x 7 in interior
- 3.55 lb with cable
Kryptonite Keeper 785 Chain Lock
- 7mm four-sided manganese links
- Disc-style cylinder
- 85 cm circumference
- 1.59 kg
Kryptonite New York 16mm Long Shackle
- 16mm hardened shackle
- 4 x 10.25 in interior
- Sold Secure Gold
- Double deadbolt
All 12 Best Bike Locks for Electric Bikes Compared in 2026
| Product | Specifications | Action |
|---|---|---|
| Kryptonite Evolution Mini-7 U-Lock with Cable |
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| Kryptonite Keeper 785 Chain Lock |
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 Seatylock FoldyLock Compact |
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| Kryptonite New York 16mm Long Shackle U-Lock |
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 Seatylock FoldyLock Forever 90cm |
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 KOHLBURG Helsinki 4ft Security Chain |
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 NDakter 18mm U-Lock with 6ft Cable |
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 Seatylock Viking Gold Chain Lock |
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 KOHLBURG Sold Secure Diamond U-Lock |
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 Hiplok D1000 32mm U-Lock |
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 ABUS Granit Super Extreme 2500 |
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 OnGuard RockSolid 14mm U-Lock |
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1. Kryptonite Evolution Mini-7 U-Lock with Cable – Best Overall Lock for an E-Bike
Kryptonite Evolution Mini-7 Bike U-Lock, 13mm Steel Shackle, 4 ft Cable
13mm hardened shackle
Sold Secure Gold
3.25 x 7 in interior
3.55 lb with cable
Pros
- Double deadbolt locks both shackle ends
- Disc-style cylinder resists picking and drilling
- 4 ft double-loop cable secures the second wheel
- FlexFrame-U frame bracket included
- Three stainless steel keys
Cons
- 3.55 lb is heavy on a long ride
- Interior too small for fat tires and battery racks
- Key replacement needs a separate registration
This is the lock we ended up buying for our own commuter, and it is the default recommendation for most e-bike riders. The 13mm hardened steel shackle locks on both sides of the crossbar through a double deadbolt design, which removes the single-lever weak point that lets a thief twist a thinner U-lock until the mechanism pops. The disc-style cylinder underneath is one of the few that we would trust against a determined lock picker rather than a shim.
Owners have filed well over fourteen thousand reviews, and the pattern in them is remarkably consistent. People praise build quality, the frame-mounted bracket, and the fact that it disappears into a pannier without rattling. Roughly 74% of ratings are five stars, which for a component product is a strong signal that it just works and stays working.
The included 4 ft KryptoFlex cable is the part people overrate. It is a real hardened steel cable and it will absolutely stop an opportunistic grab-and-go, but it is a secondary deterrent, not a second serious lock. Treat it as the cable that holds your helmet while the U-lock holds the frame.
Fitment is the real constraint here. The 3.25 by 7 inch interior is compact and tidy around a standard rack, but it will not clear a fat tire, a wide-fork e-bike, or a frame with a battery mounted along the down tube. Measure your rack and your tubes before buying, because this is the mistake that ruins the purchase for a lot of e-bike owners.
When this lock makes sense for your e-bike
This is the right call if your bike has a standard rear rack, you lock in a moderate-risk spot, and you want one dependable lock that covers the frame and a second wheel in a single purchase. The frame bracket means you actually leave the house with it, which sounds trivial until you notice how many riders skip locking entirely because the lock is too annoying to carry. It is also a strong first layer for a layered setup, paired with a heavier lock at your workplace or a second lock for the front wheel.
When you should buy something else
Skip it if you ride a fat-tire bike, a longtail cargo bike, or anything with a down-tube battery pack that needs the lock to reach across a wide frame. The 13mm shackle also sits below the point where certified Diamond-rated grind resistance even enters the conversation, so overnight outdoor parking in a known high-theft district is not its use case. If either describes you, move up to the Kryptonite New York long shackle in slot four or a Diamond-rated pick in slot nine.
2. Kryptonite Keeper 785 Chain Lock – Best Value Lock for Everyday E-Bikes
Kryptonite Keeper 785 Bike Chain Lock, 2.8 ft Heavy Duty Anti-Theft Lock
7mm four-sided manganese links
Disc-style cylinder
85 cm circumference
1.59 kg
Pros
- Four-sided link profile resists cutters and prying
- Patented end link removes the weak end joint
- Rubber coating and nylon sleeve protect paint
- Light enough for a daily backpack
- Disc cylinder resists picking
Cons
- Kryptonite rates it 5/10 security
- 85 cm is short for frame plus both wheels
- No frame mount included
If you want one lock that covers the widest range of shapes and you refuse to carry a rigid block of steel, the Keeper 785 is the honest answer. Chain goes around a fat tire, a wide fork, a basket, a frame, a seat post, or an entire second bike, and this one folds down to about the size of a water bottle. For owners with unusual frame geometry, that flexibility alone is worth more than a thicker shackle.
The 7mm four-sided manganese links are the key detail. Round link chains let a cutter sit the jaws flat and shear them in one squeeze. Four-sided links give the jaws almost nowhere to sit, which is why a 7mm square chain holds up noticeably better than a 7mm round one of the same price. The patented end link connects straight into the hardened deadbolt, removing the small jump ring that is usually the first thing to fail.
Kryptonite rates this lock 5 out of 10 on its own scale, and you should believe them. It is a deterrent against opportunistic theft, not a lock you park overnight with a very high-value e-bike. Buyers generally understand this, and the 4.6 rating across more than eleven thousand reviews reflects a crowd that bought a light flexible chain and got exactly that.
The 85 cm circumference is genuinely short. It will cover a frame and one wheel, but the standard advice of locking through the rear wheel and the frame with a chain usually needs more length than this gives you. If your security plan needs a 110 cm or 140 cm run, the Viking chain in slot eight is the same idea with more reach.
When this lock makes sense for your e-bike
Pick it when you use public transit, need a lock that fits in a daypack, ride something with odd frame shapes, or want a dependable second layer that is not a heavy brick. It pairs well with a small U-lock on the frame, and the rubber coating plus nylon sleeve mean you can loop it around painted tubes without worrying about scratching. For a commuter who locks at work all day and travels home with one bag, this is a genuinely complete setup in a single product.
When you should buy something else
Do not rely on it alone for a high-value e-bike parked outside overnight, because 7mm links are inside the reach of a serious attacker with the right cutters, and it carries no high-tier certification. It is also too short if your plan is frame plus both wheels. For overnight outdoor storage of a premium e-bike, the 10mm Gold-rated Viking chain or a Diamond-rated U-lock is the honest answer.
3. Seatylock FoldyLock Compact – Best Lightweight Lock for Daily Commuting
Seatylock FoldyLock Compact Lightweight Patented Folding Bike Lock 33.5 in
Sold Secure Silver rated
33.5 in circumference
1 kg
2020 European Design Award
Pros
- Only 1 kg
- one of the lightest certified options
- Anti-tamper rivets block side attacks
- No-rattle frame mount
- Carry case included
Cons
- Silver is a tier below Gold and Diamond
- Hinges can become a leverage point
- No cable for a second wheel
One kilogram is the headline here, and it matters more than the spec sheet suggests. A lock you will actually carry is a lock that gets used every single stop, and most theft happens during the ten minutes when people decide not to bother. This lock makes that decision easy, and it still carries a Sold Secure Silver rating rather than being an unrated novelty.
The construction is hardened steel plates inside a nylon 6 and glass fiber shell, which is what keeps the hinge sections from rattling and from chalking your frame. The patented rivets sit in a protected guard system so a pry bar cannot simply lever them out of their holes. That specific failure is a real complaint against some folding locks, and reviewers of this design do not report it.
It opens to a 33.5 inch circumference, which handles a frame plus a partial wheel and plenty of odd-shaped frames. Three automotive-standard keys ship in the box along with a key duplication card, and the mounting case with straps is genuinely useful for clipping it inside a pannier where it will not bounce against the rim.
What you are giving up is certification tier. Silver sits below Gold and well below Diamond, which means it is tested against shorter attack windows and does not claim grinder resistance. For a lock that lives in your bag and deters street-level grab attempts while you are inside a coffee shop, that is a fair trade. For a bike left alone overnight, it is not the tier you want.
When this lock makes sense for your e-bike
This is the pick for riders who park at a staffed office, a school bike room, a train station platform, or any place with short unattended windows and some human presence. It is also the one we recommend to anyone whose e-bike has unusual tube shapes, since a 33.5 inch loop adapts where a rigid U-lock simply will not reach. Three years of manufacturer defect coverage backs it up.
When you should buy something else
Skip it if your bike lives outside overnight, if you park in a documented high-theft area, or if you are relying on a single lock to cover both wheels. Because it is a folding design, the hinge sections are still a leverage point against larger cutters, and no amount of clever rivet engineering changes that physics. Layer it with something heavier at the frame and treat it as the portable half of your system.
4. Kryptonite New York Long Shackle 16mm U-Lock – Best for Fat Tires and E-Cargo Bikes
Kryptonite New York Long Shackle U-Lock, 16mm Heavy Duty Bicycle Lock
16mm hardened shackle
4 x 10.25 in interior
Sold Secure Gold
4.85 lb
Pros
- 16mm shackle rated 9/10 by Kryptonite
- Interior fits fat tires and cargo frames
- Double deadbolt resists twist attacks
- Eligible for anti-theft registration
- Owners report failed cut attempts
Cons
- 4.85 lb is far too heavy to carry daily
- No frame mount included
- Listing mentions a discontinued lighted key
This is the fitment answer for big bikes. The 4 by 10.25 inch interior clears a rear wheel and rack, a fat tire with its wide casing, and the oversized tubing on an e-cargo frame, which is exactly where compact U-locks fall apart. If you have been disappointed by locks that technically fit a bicycle but not a bike, this is the one to measure against.
The 16mm hardened shackle is a full 3mm thicker than the Mini-7, and combined with the patented double deadbolt it resists both cutting and twist attacks. The 4.7 rating across more than two thousand reviews is unusually high for a heavy lock, and the reason is visible in the reviews: owners keep telling stories about thieves who tried cutters on it and gave up. It is not a certified grinder lock, but it is a serious deterrent for bolt cutter work.
At 4.85 lb, treat it as a semi-permanent lock. The reviews are clear that owners who love it use it as a stationary or workplace lock rather than something on every ride. If you do need to move it, a sturdy pannier or a basket handles the weight, but you will feel it every time you lift the bike.
One practical caveat: the listing still advertises a lighted key that was discontinued, and that mismatch accounts for a chunk of the small share of four-star reviews. Also worth noting that no frame mount is included, so plan how it lives on the bike or in your bag before you buy.
When this lock makes sense for your e-bike
It is the right choice for fat-tire riders, longtail and e-cargo owners, and anyone whose daily parking is a private garage, a locked shed, or a fenced workplace rack where the lock can just stay. The internal area also handles the classic rear-wheel-through-frame-and-rack technique, which smaller U-locks physically cannot do. Registered owners are also eligible for anti-theft protection, which is worth reading the fine print on before you rely on it.
When you should buy something else
Do not buy it as your only portable lock. Carrying 4.85 lb on a commute is punishing, and it is certified against cutter attacks rather than disc cutters, so a determined thief with a grinder is outside its design envelope. If you need a portable lock with serious cut resistance, the KOHLBURG Diamond U-lock in slot nine is lighter and carries the highest certification tier in this roundup.
5. Seatylock FoldyLock Forever 90cm – Premium Folding Lock for High-Threat Parking
FoldyLock Forever Folding Bike Lock – Patented Sleek High Security Sold Secure Gold Bicycle Lock – Heavy Duty Anti Theft Smart Guard with Keys – 90cm
Sold Secure Gold 18/18
0.25 in hardened steel plates
35.4 in circumference
3.9 lb
Pros
- Gold 18/18 rating with 0.25 inch plates
- 90 cm suits e-bike frames and fat tires
- Anti-tamper rivets and guard system
- Frame mount and carry case included
- Waterproof and corrosion resistant
Cons
- 3.9 lb is heavy for a folding lock
- Gold still only certifies a 3 minute attack
- Plates can deform if repeatedly pried
This is the step up from the Compact, and the difference is real. The plates go from thin folded steel to 0.25 inch hardened steel, the circumference grows to 90 cm, and the certification moves from Silver to Gold at an 18 out of 18 score. For someone who wants folding-lock convenience without the bottom end of the certification ladder, this is the version to own.
Longer circumference matters more than it sounds. At 90 cm you can loop through the frame, the rear wheel, and a rack on many e-bike geometries where 33.5 inches leaves you stuck choosing between the frame and the wheel. Reviewers who upgraded from the Compact cite exactly this as the reason the extra weight is tolerable.
At 3.9 lb it is honest but heavy, and the frame mount with straps is what makes that weight bearable, since it stays tight against the frame instead of swinging in your bag. The hexagonal body profile also resists being gripped for a twisting attack, which is a real improvement over flat plates.
Be clear-eyed about what Gold means. It certifies resistance to a three minute attack window with defined tools, which is a meaningful upgrade over an unrated lock, but it is not grinder resistance and it should never be described that way. A lot of owners describe it as the sweet spot, and for daytime and workplace parking in a risky area, we agree with them.
When this lock makes sense for your e-bike
Choose it when you park a valuable e-bike in a place with real foot traffic and elevated theft attempts, but not in a genuinely grinder-equipped hotspot, and you want one lock rather than a system. The 90 cm reach, corrosion resistance, and waterproof construction also suit riders who store outdoors in damp coastal or winter climates. Three years of defect coverage and the included case round it out.
When you should buy something else
If you carry it on every ride, the 3.9 lb will wear you down, and the Compact in slot three does the same job with half the mass at a lower tier. If you face angle grinder attacks, folding plates deform under a disc long before the links would, so use a hardened U-lock instead. And if someone has to lever the plates apart repeatedly, that is how folding designs eventually fail.
6. KOHLBURG Helsinki 4ft Security Chain – Best Long Chain for Frame and Wheel
KOHLBURG Security Chain Bike Lock Heavy Duty [Sold Secure Gold] 4ft Long
8.3 mm four-edge links
125 cm length
Sold Secure Gold
5.5 lb
Pros
- Thick 8.3 mm four-edge links
- 125 cm covers frame and front wheel
- Sold Secure Gold certified
- Anti-pick cylinder plus soft sleeve
- Four keys included
Cons
- Heaviest lock we carried
- so it is hard to position while riding
- Plastic lock housing chips when dropped
- One report of the mechanism seizing outdoors
- Nylon sleeve can creep up the chain
Length is the selling point. At 4 ft, or 125 cm, this chain covers a frame, a front wheel, and a lot of rack geometry in a single pass, which is more than almost every U-lock in this roundup can manage. If your locking plan is the classic frame-through-rear-wheel-plus-rack technique and your frame is bulky, this is the one that physically works.
The 0.33 inch, 8.3 mm four-edge titanium steel links are among the thickest we saw in this category, and the Sold Secure Gold certification puts it in a tier the cheaper chains never reach. The anti-pick cylinder and the soft sleeve that protects both the lock and your paint are details that show up in daily use more than the spec sheet suggests.
![KOHLBURG Security Chain Bike Lock Heavy Duty [Sold Secure Gold] 4ft Long customer photo 1](https://www.geekfill.com/wp-content/uploads/2026/09/B08NCG1PFK_customer_1.jpg)
It is also the lowest-rated product here at 4.3 stars, and the reason is durability rather than security. Reviewers credit the thickness and the certification but point at the plastic housing around the lock mechanism, which chips when the chain lands on pavement. That is a cosmetic and mechanical weakness in the part you touch most, not a flaw in the steel.
There is also a small but real cluster of reports about the locking mechanism seizing after sitting outdoors overnight in mild weather, and about the nylon sleeve creeping up the chain and interfering with locking. Neither appears in the majority of reviews, but if you store your bike outside year-round, test the mechanism before you need it in a hurry.
![KOHLBURG Security Chain Bike Lock Heavy Duty [Sold Secure Gold] 4ft Long customer photo 2](https://www.geekfill.com/wp-content/uploads/2026/09/B08NCG1PFK_customer_2.jpg)
When this lock makes sense for your e-bike
It fits cargo bikes, longtail frames, and fat-tire builds where a standard U-lock cannot reach around the geometry, and the manufacturer explicitly markets it for e-bikes, pedelecs, and bike trailers. It is also a good workplace lock: heavy, permanently mounted to a frame or kept in a locker, and used by the same bike every day rather than shuffled between rides.
When you should buy something else
Five and a half pounds is not a portable weight, and anyone riding with it on the frame will feel every kilometer. If you need something you carry daily, the Keeper 785 in slot two is the flexible travel option. And if your primary threat is an angle grinder rather than bolt cutters, chain has more exposed link surface than a U-lock and is the wrong tool for that job.
7. NDakter 18mm U-Lock with 6ft Cable – Best Budget Lock for E-Bikes
NDakter Bike Locks Heavy Duty Anti Theft, Bicycle U Lock for Ebike, 18mm Shackle, 6FT Steel Security Cable with 3 Keys for Electric Escooter, Motorcycle, Moped, Dirt-Bike, Tri-Bike Wheel Lock Sturdy
18mm hardened shackle
5.5 x 7 in interior
3.4 lb
3 brass keys included
Pros
- 18mm shackle is unusually thick for this tier
- Extra-wide 5.5 x 7 in interior fits fat tires
- Three solid brass keys with dust cover
- Double deadbolt zinc alloy cylinder
- Covers frame and wheel in one purchase
Cons
- No independent Sold Secure certification
- No mounting bracket included
- Bundled cable is a deterrent only
Spec for spec, this is the most surprising lock in the roundup. An 18mm shackle is thicker than the shackle on locks costing two to three times as much, and the manufacturer states a 12-ton hydraulic cutting force rating. The 4.7 rating from 801 reviews reflects owners who compared it against expensive rivals and found it held up, which is not what we expected at this budget level.
The extra-wide 5.5 by 7 inch interior solves the fitment complaint that ruins so many U-locks for e-bikes. It clears a fat-tire casing and a wide fork, and with the bundled 6 ft cable you can cover the frame and a wheel in one purchase. That combination makes it a genuinely complete setup rather than a single lock that leaves half the bike exposed.
Three solid brass keys with a dust cover is generous, and the double deadbolt zinc alloy cylinder is specified to resist drilling, picking, and leverage. The 2.5 mm silicone cover protects the frame from scratching, which sounds minor until you look at how many locks leave paint transfers on e-bike down tubes.
Here is the honest limitation. There is no independent Sold Secure or ART certification on this lock, which means nobody has independently tested how long it survives an attack. Marketing numbers like 12 tons of cutting force are calculated claims, not laboratory results. It is a good lock. It is not a certified one, and those are different things.
When this lock makes sense for your e-bike
This is the pick for students, first-time e-bike owners, and anyone replacing a decades-old cable lock with a real piece of hardware for the first time. The thick shackle, the wide interior, and the included cable mean a genuine step up in protection for a modest outlay, and the fat-tire fitment makes it one of the few budget options that works on a wide e-bike out of the box.
When you should buy something else
Do not park a very high-value e-bike with this as your only protection overnight, because the absence of independent certification means you have no data on grinder or extended attack resistance. It also comes with no mounting bracket, so you will need to solve carrying it yourself. If your bike is high value and unattended, spend up on a certified Gold or Diamond lock instead.
8. Seatylock Viking Gold Chain – Best Lock for Dust, Rain and Long Storage
Seatylock Viking Sold Secure Gold Magnetic Patented Robust Bike Chain Lock
Sold Secure Gold 17/18
10 mm square hardened links
110 cm length
Magnetic closure
Pros
- Gold 17/18 rating with 10 mm square links
- Patented magnetic closure
- Automatic keyhole shutter blocks dust and rain
- Neoprene sleeve prevents frame scratches
- Available in 90
- 110 and 140 cm
Cons
- Roughly 5 to 6 lb is too heavy to mount on the bike
- Links can be cut with a battery grinder given time
- Some users find links thin for a Gold chain
This chain has the highest combined rating in the roundup alongside the NDakter, and the feature owners single out most is the patented magnetic closure. It holds the chain captured while you turn the key, so a second tool cannot quietly unthread the links while the lock is open. It is a small engineering detail that solves a real, boring problem, and reviewers consistently say they did not know they needed it until they saw it.
At 110 cm with 10 mm square hardened links and a Sold Secure Gold 17/18 score, this is the most substantial certified chain in the group. The automatic keyhole shutter keeps grit and rain out of the cylinder, and the UV-resistant neoprene sleeve protects both the chain and your frame. For bikes stored outside through a winter, those weather details are the difference between a lock that works in March and one that does not.
It is also available in 90 cm and 140 cm versions, and the longer option is worth considering if you need frame plus both wheels. Three keys and a duplication card are included, which matters if you are pairing it with a second lock and want one key on your keyring.
The honest negatives are weight and geometry. At roughly 5 to 6 lb it is not a riding lock, and chain links, even square 10mm ones, give an angle grinder a lot of surface to work on. A few reviewers also feel the link gauge is thinner than they expected for a Gold-rated chain. It is a strong deterrent against cutters, not a grinder-proof lock.
When this lock makes sense for your e-bike
It suits riders with a dedicated outdoor storage spot, a shared garage, or a long-term parking arrangement where the lock lives on the bike rather than in your bag. It is also the chain to buy if you live somewhere with coastal air, road salt, or heavy rain, because the shutter and neoprene sleeve are the best weather protection in this roundup. The magnetic closure is genuinely useful if you lock up in a hurry with gloves on.
When you should buy something else
Do not buy it as a portable daily lock, because you will not want to carry 5 to 6 lb on a commute. If your real threat is angle grinder attacks, its exposed links work against you and a hardened U-lock is the correct shape. And if your budget is tight, the Keeper 785 gives you flexibility at a much lower tier, accepting a lower security rating in exchange.
9. KOHLBURG Sold Secure Diamond U-Lock – Best Certified Diamond Lock
KOHLBURG Highest Security U Lock [Sold Secure Diamond] Bike Lock, 4 Keys
Sold Secure Diamond
14 mm hardened shackle
6.7 x 13.5 in opening
3.3 lb
Pros
- Top Sold Secure certification tier
- 14 mm hardened alloy shackle
- Multi-disc cylinder with two-chamber design
- Large opening fits fat tires and e-bike frames
- Two-way bracket and 67 in cable included
Cons
- Diamond rating achieved at only 3.3 lb
- Soft shackle cover wears over time
- Some keys need occasional wiggling
The reaction in the reviews is the story here. Buyers expect the top certification tier to be reserved for a heavy, premium-priced lock, then find Diamond certification on a 3.3 lb lock they can actually carry. The 72% five-star share is largely that surprise, and it is not unreasonable. If you want the rating rather than a particular brand name on the lock, this is the combination of weight and certification that fits daily use.
Mechanically it is a serious lock. The 14 mm hardened alloy shackle, the multi-disc cylinder with a T-structure two-chamber design against drilling, and the 6.7 by 13.5 inch opening give you a wide, well-built U-lock that clears fat tires and chunky e-bike frames without difficulty. The two-way mounting bracket and the 67 inch spiral cable make it a complete kit out of the box.
Where the Diamond rating helps and where it does not
Diamond is the highest tier in the Sold Secure ladder, tested against the widest range of attack methods of any grade in the scheme. Getting it at 3.3 lb rather than 4 lb or more is a genuine engineering achievement, and it means you can carry a certified top-tier lock without the weight penalty that normally comes with one.
It is worth being precise about what that rating does not mean. Diamond certification tests defined tools over a defined window. It does not certify indefinite resistance, and locks in this class vary in how much material sits at the shackle-to-body junction, which is the area attackers target first. Read the rating as a strong verified baseline, not as a promise.
Who should buy it and who should not
Buy it if you park a valuable e-bike outdoors, you want a certified top-tier lock, and the usual weight of one is the reason you have been putting off upgrading. It is also the best option here for a rider who wants a large internal area without carrying a heavy long-shackle model. The 327 reviews are fewer than the big names here, but they are consistent.
Pass on it if you need a long chain for frame plus both wheels, or if you ride long distances and want a lock you can genuinely forget about. A few buyers report the soft shackle cover wearing through with use and occasional stiffness in the cylinder. If the highest possible security matters more to you than carrying weight, the Hiplok D1000 in slot ten is the heavier, more proven alternative.
10. Hiplok D1000 32mm U-Lock – Best Lock for Angle Grinder Resistance
Hiplok D1000 Anti-Angle Grinder Bike Lock | Resists Angle Grinder Attacks | 32mm Shackle with 3 Replaceable Keys | High Security D Lock for Scooter, E-Scooter, Bicycle, E-Bike, Cargo Bike & Motorcycle
32 mm shackle
92 x 155 mm locking area
Sold Secure Diamond and ART 4 Star
ENRA certified
Pros
- 32 mm shackle is the thickest tested here
- Anti-rotation tabs force two cuts
- Sold Secure Diamond plus ART 4 Star
- ENRA certification as a third check
- Three coded replaceable keys
Cons
- Heavy for daily carrying
- 92 mm interior will not clear fat tires
- Overkill for indoor or low-risk parking
This is the lock to buy if your e-bike sleeps outside overnight somewhere with organized bike theft, and the reason is the combination of independent certifications. Sold Secure Powered Cycle Diamond, ART four stars, and ENRA certification all point the same direction, and the 32 mm shackle is by a wide margin the thickest hardened steel in this roundup. That is a lot of material for a disc cutter to chew through.
The anti-rotation double locking tabs are the detail that matters mechanically. Without them, a thief can grab the shackle and rotate it, using torque against the lock body instead of cutting steel. With them, the shackle has to be cut through on both sides, which doubles the work. The rubberised outer shackle also means it will not scar your frame while it is locked in place.
At 1.93 kg it is not light, and Hiplok sells a carry pouch, a pannier mount, and a lock sleeve so you have options for carrying it on a bike that does not have a frame bracket hole. Three coded replaceable keys ship with it, and registering the key code opens the lifetime warranty path, which is unusually generous for a lock at this level.
The 92 by 155 mm locking area is the compromise. It is generous front to back, but 92 mm of internal width will not clear a fat-tire bike, and it is tighter than the space you need for many wide racks. Check your geometry carefully, and consider the KOHLBURG Diamond in slot nine if clearance is the problem.
When this lock makes sense for your e-bike
It belongs on a commuter or delivery e-bike parked on a city street overnight, at a rail station, or on a campus where bike theft is an organised business. It is also the lock to choose if you have already had an e-bike stolen and you are done treating the problem as a cost of commuting. The named certification tiers are the reason, because they are the numbers you can actually verify independently.
When you should buy something else
It is a heavy lock and the weight is real, so it is hard to justify on a modest commuter or a bike stored indoors. Fat-tire riders should rule it out on internal width entirely. And if grinder attacks are not part of your threat picture, a Gold-rated lock such as the New York long shackle or the Viking chain will be a more sensible use of your money.
11. ABUS Granit Super Extreme 2500 – Best Eurobike Award Lock for Standard Frames
ABUS U-Lock Granit™ Super Extreme 2500/165HB230 – specialised Bicycle Lock for Bicycles and e-Bikes Against Saw Attacks with Angle Grinders – ABUS Security Level 15, USH2500
20 mm square hardened shackle
ABUS security level 15
Eurobike Award 2023
Includes USH2500 bracket
Pros
- ABUS level 15
- the highest the brand issues
- 20 mm hardened square shackle
- Eurobike Award 2023 for grinder-resistant design
- Power Cell technology resists impact
- XPlus cylinder resists picking
Cons
- Interior too narrow for many e-bike frames
- Shackle-to-crossbar junction reported as a weak point
- Key must stay in the body to close the shackle
- One report of a faulty bracket attachment
ABUS makes this lock in very large numbers and has done for decades, and the brand consistency is part of the appeal. The 20 mm square hardened shackle sits at the top of the range, Power Cell technology is the material that the brand credits for impact and grinder resistance, and the Eurobike Award 2023 win is an independent panel decision rather than a marketing claim.
Reviews on this product are sharply divided, and the split is the most useful information we found. Owners who fit it to a compatible frame rate it very highly and cite published cut testing. The negative reviews are not about build quality, they are about fit and about the shackle joint, and they are the most serious negative feedback anywhere in this roundup.
The two fit complaints are worth repeating. First, the interior width is too narrow for a lot of e-bike frames, fat tires, and thick racks, so confirm your measurements before ordering. Second, some owners and testers point at the shackle-to-crossbar junction as the structural weak point for angle grinder attacks, which is the same vulnerability a careful evaluator looks for in any grinder-resistant lock.
One practical irritation: the key has to stay in the lock body to close the shackle, which is awkward in the dark. The included USH2500 rack mount is otherwise well designed and quiet. At 1800 g it needs a bag or a bracket to travel with, same as the Hiplok.
When this lock makes sense for your e-bike
It fits riders on slim, standard frames who want a hardened grinder-focused lock from a brand with a long service record, and it suits anyone who values a brand’s decades of field feedback over buying the newest name in the category. If you lock at a rack you are confident about and your frame is conventional, it delivers a serious hardened shackle in a proven package.
When you should buy something else
Do not buy it for a fat-tire, longtail, or wide-fork e-bike without measuring first, because fit is the single most common reason buyers regret this lock. If your area has documented angle grinder attacks, weigh the reported junction weakness against the Hiplok D1000, which is thicker and uses anti-rotation tabs instead. Riders who lock in the dark often find the key arrangement frustrating.
12. OnGuard RockSolid 14mm U-Lock – Best Compact Grinder-Resistant Lock
OnGuard RockSolid U-Lock – 14 mm (0.55 in) Hardened Steel Bike Lock, 90 mm × 175 mm (3.55 in × 6.90 in) Interior Dimensions, Angle-Grinder-Resistant Coating, X4P Quad Lock Security
14 mm TriRadius hardened shackle
90 x 175 mm interior
X4P quad lock
3 lb
Pros
- Angle-grinder-resistant coating disrupts cutting wheels
- X4P quad lock secures four points
- 14 mm TriRadius hardened steel
- Compact interior cuts down pry space
- Five keys plus 2 year warranty
Cons
- Shortest shackle here at 90 mm
- Bent keys reported on arrival
- Keys feel thinner and easier to bend
- No mounting bracket included
The OnGuard approach is a coating rather than sheer mass. The exterior surface is treated to disrupt cutting wheels, which means a disc cutter does not bite cleanly and grinds rather than slices. Combined with the 14 mm TriRadius hardened shackle and the X4P quad lock that secures the shackle at four points against prying and twisting, it produces real resistance in a 3 lb package.
What makes it interesting for e-bikes is the compact 90 by 175 mm internal geometry. A tight interior leaves very little room for a lever or for a thief to get a cutting wheel at a shallow angle, so the same shackle thickness works harder than it would on a bulky lock. Owners who fit it to a standard frame report it stopped a real cut attempt.
Five keys in the box is genuinely unusual for a lock at this tier, and there is a two year manufacturer warranty behind them. The X4P mechanism is the other detail worth knowing, since most U-locks lock the shackle at two points and this one uses four.
The size is the limitation and it is a real one. At 90 mm of interior width this is the shortest shackle in the roundup, and multiple reviews note it will not clear fat tires or a rear wheel plus rack. Several buyers also report one of the five keys arriving bent, and that the keys feel thinner and easier to bend than other OnGuard products. Check the keys on arrival.
When this lock makes sense for your e-bike
It is a good fit for standard-frame e-bikes parked in high-theft urban locations where you want grinder disruption without carrying a very heavy block of steel. At 3 lb it is one of the more portable certified options, and the coating-based approach is worth it if you are comparing against other U-locks of similar weight that offer no grinder consideration at all. A standard diamond-pattern rear rack is its natural home.
When you should buy something else
Rule it out for fat-tire, cargo, and longtail bikes, and for anyone whose locking plan requires capturing the rear wheel and the rack in one pass. If you want a longer term answer, the Kryptonite New York in slot four handles those geometries with far more internal space. It is also the one in this roundup with no mounting bracket included, so plan how it travels.
What Type of Lock Is Best for an E-Bike?
The best lock type for an e-bike is a hardened steel U-lock, because a rigid shackle concentrates all of its material at exactly two points that a thief must both sever, and a thick shackle forces a disc cutter to destroy multiple cutting wheels. A U-lock at the frame and rear wheel, paired with a chain or second lock for the front wheel, covers more attack surface than any single lock type. For overnight outdoor parking, add certified Diamond or ART four-star grading, because an e-bike attracts battery thieves who bring power tools.
Here is how the four main shapes actually stack up.
U-lock. The most secure shape per dollar and the only geometry where a small interior actively helps, because there is nothing to grip and no hinge to lever against. Weaknesses are weight, fixed size, and awkwardness. You cannot resize it, and the internal width either clears your frame or it does not. For most e-bike riders this is the primary lock, and we would not build a system around anything else.
Chain. Flexible enough to reach any geometry, including frames and racks that defeat a U-lock, but the weakest link is exposed. Round links are the worst; four-sided square links at 8mm or more are respectable. Chains are the right secondary lock, the right lock for oversized cargo frames, and the right choice when you need reach more than you need pure rigidity.
Folding lock. A compromise that trades a little security for a lot of packability. At a one kilogram you will actually carry it on every ride, which no 3 lb U-lock achieves. The hinge sections remain a leverage point, and certified tiers top out well below Diamond, so folding locks belong in layer two rather than layer one.
Smart and GPS locks. These sit at layer three. Fingerprint access, a motion alarm, and phone notifications tell you something happened and roughly where the bike went, which helps police recover it. They do not physically stop a determined thief, and a tracker that alerts you an hour later is not a replacement for steel. We treat them as valuable additions, never as the primary lock.
The pattern that shows up again and again in rider discussions is that one lock is never enough. On the r/ebikes thread answering the question about the best lock for an e-bike, the top-voted advice is blunt: no bike is safe unless you have at least two locks on it. That matches the physical logic, since a second lock forces an attacker to abandon the setup they brought and improvise with whatever they have on hand.
How to Choose a Bike Lock for an Electric Bike
Start with these four labelled criteria, in this order: Rating, Lock Type, Strategy, and Fit. Most people get the order wrong and spend their budget on the wrong variable.
Rating. Buy a Powered Cycle rating, not a Pedal Cycle rating. The two ladders use similar labels, and a Gold lock for a standard bicycle is not automatically a Gold lock for an e-bike. The Powered Cycle test assumes a heavier machine that generates more heat and sits under more stress, so it is the honest standard for what you are riding. The Sold Secure ladder runs Bronze, Silver, Gold, and Diamond, and each step roughly doubles the resistance time against the same attack tools. The ART Foundation ladder runs one to five stars, where four stars is the level most e-bike owners should be aiming.
Our general rule: Silver for staffed short-stay parking, Gold for unstaffed daytime parking, Diamond when the bike sleeps outside overnight in a city with organised theft. You can read the broader picture in our general bike lock buying guide, or look at smart lock options in our fingerprint and alarm lock reviews.
Lock type. Rigid U-lock for the frame, chain or folding lock for the wheel, cable as the third layer. Match the type to the parking duration. A five-minute coffee stop does not need a Gold Diamond lock, and a fourteen-hour overnight does not need a cable at all, it needs something you can lift.
Strategy. Decide how many layers you carry before you decide what they are. Two locks of different types beats one lock of a higher tier, because the attacker has to work twice. The four-level framework we use is: the frame lock, the second wheel, the removable hardware, and the anchor object itself. Most riders stop at level one and wonder why they feel nervous.
Fit. Measure before you order, and this is where e-bike riders get burned. Take a tape to the tube or rack you intend to pass the lock through and measure the internal width and the internal length of the lock. You need the internal width of your frame plus clearance, and for fat tires you need the internal width of the tire plus the frame. On e-cargo bikes with oversized tubing, a 3.25 inch U-lock interior is simply not going to work, and owners consistently report discovering this only after delivery. Our picks above list internal dimensions for every lock so you can match them before buying.
Two more purchasing variables deserve honest treatment. The first is weight. Strong locks run 3 to 6 lb, and cargo riders can end up carrying 8 to 15 lb of chain. A lock you refuse to carry is a lock that does not exist, so choose the heaviest lock you will actually bring every time, and add a heavier stationary lock at work if you can. The second is the anchor point. A premium Diamond lock looped through a thin street sign or a sapling is only as strong as that sign, so verify your anchor before you buy anything.
Finally, a note on keyed-alike systems and the anti-theft registration programmes that come with premium brands. ABUS and AXA are the ecosystems most riders encounter for locks that match a frame lock, a wheel lock, and a battery lock with one key. That is the cheapest security upgrade available to you, and it appears constantly in rider discussions but almost never in buying guides. Separately, read the registration programme fine print before you count on it: several brands offer replacement coverage that excludes theft involving power tools, which is precisely the attack that occurs with e-bikes.
How to Lock an E-Bike in Six Steps
Most lock failures are positioning failures, not product failures. A correct lock through a weak anchor is the same as no lock, so work through these in order every single time.
1. Verify the anchor first. It should be a solid, fixed object that cannot be unscrewed, sawn, or lifted. A proper bike rack bolted through concrete, a hardened street fixture, or a substantial immovable post all qualify. A thin signpost, a small tree, a wooden bench, and a plastic pipe rack do not.
2. Lock high. Keep the lock at roughly sixteen inches or more above the ground so it cannot be snapped with a long bar. Higher is better as long as the lock still passes through the frame.
3. Loop through the frame, not the wheel. The rear wheel alone lifts out of almost any rack. Pass the U-lock through the rear wheel, the rear triangle of the frame, and the rack, in one continuous loop. This is the technique that makes the internal dimensions of your lock matter so much.
4. Use the smallest opening that works. That is why a compact internal area is an advantage rather than a limitation. A short gap gives an attacker no room to place a lever or to attack the lock body at an angle.
5. Add a second lock of a different type. Run a chain or a second U-lock through the front wheel and the head tube. Different geometry means the attacker cannot repeat the same tool position twice, and that is the entire point of layering.
6. Remove the battery if the bike is staying put. The pack is often the most valuable single component on the machine, and the frame without it is a heavy inconvenience rather than a desirable prize. Carry it, or lock it separately with a keyed-alike lock.
For most riders, two locks carried daily and a heavy lock kept at work beats one excellent lock carried nowhere. A Brooklyn shop owner described to riders in the forums uses three locks for any outdoor parking over an hour, which is a good sanity check on how much hardware is reasonable.
Protecting Your E-Bike Battery, the Part Thieves Actually Want
The battery is the highest-value part of your e-bike and the first thing a thief goes for. It can represent roughly half the purchase price on many builds, and a stolen frame with no motor and no pack is scrap that nobody can resell quickly. The regular consensus in rider discussions is exactly that: if a thief has to buy a battery to get power, most of them decide against it.
So the highest-value security action for your e-bike is not a more expensive frame lock. It is deciding what happens to the battery.
1. Remove it and take it with you. This is the single most effective action available, and the reason riders resist it is weight. Removable packs run roughly 15 to 25 lb, which is a real inconvenience to carry up a flight of stairs or across a campus. If your commute is short and indoor, the trade is usually worth it.
2. Lock the battery in place when you cannot remove it. Frame-integrated batteries need the bike to be moved before the pack can be pulled, which already adds real time. A secondary cable through the battery and the frame is better than nothing and costs almost nothing.
3. Use a keyed-alike battery lock. ABUS and AXA both make frame locks and battery locks that open with the same key, so you are not fumbling with a second key ring in the dark at a rack. This is the cheapest meaningful upgrade on the list and almost nobody buys it.
4. Lock the skewer and the wheel hardware. A hardened skewer bolt or a locking nut through the rear wheel prevents the whole wheel with pack and frame from being lifted and carried. Riders on e-bikes with removable packs care about this more than bicycle riders do, because the wheel is the way the whole thing leaves.
5. Know what your insurance actually covers. Several manufacturer anti-theft programmes are opt-in, require registration, cap coverage, and exclude theft involving power tools. A home policy may treat a motorised bike differently from a bicycle. Read the exclusions before you assume you are covered, because the exclusion most likely to matter is the attack most likely to occur.
Locking hardware is worth a sentence of its own. Anti-theft skewers, locking nuts, and aftermarket wheel and frame bolts are inexpensive upgrades that remove a fast, silent, tool-free way to steal a wheel. On a bike with a battery worth half its value, that is a small spend against a large loss.
Frequently Asked Questions
Which bike lock is the most theft-proof?
No lock is theft-proof. The closest thing is a hardened steel U-lock carrying a Sold Secure Powered Cycle Diamond or ART 4 star rating, locked to a solid anchor with the frame and rear wheel captured in one loop. Even then, hydraulic cutters and long attacks defeat portable locks, which is why riders use two locks of different types.
Will an angle grinder cut through a bike lock?
Given enough time and spare cutting discs, yes, almost anything portable. What certified grinder-resistant designs change is the cost of the attack. A thick shackle forces multiple cuts, composite or coated surfaces wear out the disc itself, and anti-rotation tabs remove the leverage position. The practical effect is that a theft that takes twenty seconds becomes a four to eight minute job that most thieves abandon.
What is the hardest bike lock to break into?
Among the locks we covered, the Hiplok D1000 is the most resistant by independent testing, with a 32 mm shackle, Sold Secure Powered Cycle Diamond, ART 4 star, and ENRA certification. It is also the heaviest and most expensive. The KOHLBURG Diamond U-lock offers the same top certification tier at a much lower weight and a lower outlay.
Is ABUS or Kryptonite better?
For an e-bike, Kryptonite has the advantage in certified fit and long internal measurements: the New York long shackle clears fat tires and cargo frames that many ABUS locks cannot. ABUS has the advantage in hardened grinder-focused design and brand longevity, and its keyed-alike ecosystem is broader for matching a battery lock. Riders who carry one lock usually pick Kryptonite; riders matching a full system usually pick ABUS.
What is better, Litelok or Hiplok?
Both are strong grinder-resistant options, but they are built differently. Hiplok’s D1000 uses a 32 mm hardened shackle with anti-rotation tabs, which is a heavier and more proven approach. Litelok uses a composite-coated shackle that is lighter for comparable published testing, which matters if you carry the lock every ride. If you cycle daily, the lighter composite design is often the more realistic choice.
Is a Kryptonite bike lock worth it?
For most e-bike owners, yes, because the Kryptonite range spans the tiers you actually need, from a Gold-rated U-lock with a 13 mm shackle for daytime parking to a 16 mm long-shackle model that fits fat tires and cargo frames. The registration programme adds value too, but read the fine print: coverage is capped and theft involving power tools is commonly excluded.
Should I use two locks on my ebike?
Yes. Two locks of different types forces a thief to attack two different geometries with tools they may not have brought for the second one. A U-lock on the frame and rear wheel, plus a chain or folding lock through the front wheel, is the standard pairing. Make sure both locks pass through the frame rather than only the wheels, and check your anchor before you start.
Final Verdict: Which E-Bike Lock Should You Buy?
If you take one thing from this roundup of the best bike locks for electric bikes, take the Kryptonite Evolution Mini-7 U-Lock with its 4 ft cable. Its 13 mm double deadbolt shackle, Sold Secure Gold certification, and fourteen thousand owner reviews make it the pick we trust for a standard-rack commuter and the one we carry ourselves. It is not the most certified lock here and it is not the heaviest, but it is the best balance of protection, portability, and evidence, and that is what a daily lock has to be.
Match your bike to the geometry instead. Fat tires, longtail frames, and e-cargo tubing go to the Kryptonite New York 16 mm long shackle, whose 4 by 10.25 inch interior clears what smaller U-locks cannot. Overnight outdoor parking in a city with organised grinder attacks goes to the Hiplok D1000, and a budget upgrade that will still fit a fat tire goes to the NDakter 18 mm U-lock. Riders who need one flexible lock for transit and odd frames go to the Keeper 785 chain, and anyone who refuses to carry more than a kilogram goes to the FoldyLock Compact.
Then do the two things no lock can do for you. Carry two locks of different types, and take the battery with you or lock it separately. In 2026, the cheapest upgrade is still adding a second lock you actually bring on every ride.