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An e-bike is a car replacement, a hill flattener, and — the part nobody mentions at the register — a 60-pound object you have to leave outside a coffee shop. That’s where the money goes wrong. A lock is the only thing between your bike and someone with a van and a cordless grinder, but it’s also the thing you carry up three flights after every ride. The right lock is the one whose weight and security match how you actually park.
After years of chaining bikes to whatever railing was closest, my team spent the past six months living with 12 e-bike locks — U-locks, chains, folders, and a couple of frame locks — on commutes, grocery runs, and overnight porch parking. What separates them isn’t the marketing; it’s whether the key turns cleanly in cold hands and whether the mount rattles over brick. One thing experience teaches: no lock beats a bad rack choice at 11 p.m. The picks below are the ones worth the weight.
Best for High-Value E-Bikes
Kryptonite Evolution 1090
Key Features
- Length: 3 ft (90 cm)
- Weight: 2.77 kg (6.1 lb)
- Chain thickness: 10 mm six-sided manganese links
- Security rating: Sold Secure Gold
- Price: Premium
Sold Secure Gold is a test result, not a phrase someone put on a box, and it is the first thing we check on a lock that will sit outside with several thousand dollars of motor and battery attached to it. The Evolution 1090 has the rating, and it earns it with 10 mm six-sided manganese links: flat-sided steel gives a bolt cutter or a grinder disc far less to bite than the round 6 to 7 mm chain on a cheap lock.
Three feet of chain, a reinforced oval crossbar and a disc-style cylinder that resists picking, plus three stainless steel keys and registration for Kryptonite’s anti-theft and key-replacement programs. We paid close attention to the key count, because a lock is only as good as its worst day. One key on the ring, one in the bag and one at home is the arrangement that keeps a bike from being stranded by a lost key.
At 2.77 kg, roughly six pounds, it is the heaviest lock in this group, and we will not pretend otherwise. The answer is not a lighter lock but a different habit: this is the lock that lives with the bike, coiled around a rack or a frame tube for the ride, rather than the one that goes in a backpack. Treat it that way and the weight stops being a daily decision.
The details hold up too. A nylon sleeve keeps the chain off your paint, and a sliding cap keeps grit out of the keyway. If a key starts to drag, a dry lock lubricant is the fix; a wet oil just gives the grit something to stick to.
Pros
- Sold Secure Gold, the top rating in this group
- 10 mm six-sided links resist cutters and leverage
- Three keys plus theft-protection registration
- Sleeve and dust cap protect paint and cylinder
Cons
- Three-foot reach is tight on wide posts and fat racks
We point e-bike owners who park on the street here first: a Gold-rated 10 mm chain makes the bike a much worse target.
Best for Everyday Commuting
Kryptonite KryptoLok Standard
Key Features
- Interior size: 4 x 9 in
- Included cable: 10 mm x 4 ft
- Security rating: Sold Secure Silver
- Shackle thickness: 12.7 mm hardened steel
- Price: Midrange
Four inches by nine: that is the interior of the KryptoLok Standard, and it is the number that decides whether a U-lock is usable on an e-bike at all. A compact commuter U-lock will go around a wheel and a thin seat tube. It will not go around a fat down tube and the leg of a bike stand at the same time. This one does, and the 10 mm, four-foot cable in the box takes care of the front wheel while it is there.
The compromise is the rating. This is Sold Secure Silver rather than the Gold of our top pick, which reflects a shorter resistance time against serious tools rather than a flimsy lock, because the shackle is still 12.7 mm hardened steel with a double-deadbolt crossbar holding both ends. For a bike that sleeps indoors and gets locked in daylight for an hour at a time, we think that is the sensible trade, and it saves a meaningful amount against the Gold-rated chain.
The kit is the reason to pick it over a bare U-lock. Loop the cable through the front wheel and around the frame and one key covers both ends of the bike. On an e-bike with a quick-release front wheel, that is the difference between locking a bike and locking half of one. Total weight with the cable is 3.65 lb, which the included frame bracket carries without complaint.
Pros
- Interior opening fits fat e-bike tubes and stand legs
- Includes a 10 mm four-foot cable for the front wheel
- Double-deadbolt shackle secures both ends
- Frame bracket carries it without a bag
Cons
- Bracket can creep down the seat tube over months
- Keyway needs a firm, square push to turn
Our pick when the bike lives indoors and you want a U-lock that actually spans fat e-bike tubes and a rack leg together.
Best for Budget Setups
Sportneer U-Lock + Cable
Key Features
- Weight: 1.3 kg (2.9 lb)
- Exterior size: 7.76 x 5.02 in
- Included cable: 5 ft steel
- Shackle thickness: 17 mm alloy steel
- Price: Budget
Cheap U-locks usually hide a thin shackle, so the Sportneer is a pleasant surprise: 17 mm of alloy steel, a zinc alloy core, two keys and a five-foot steel cable, all at the bottom of this group’s price range. On paper that is a lot of lock for the money, and the 12-ton hydraulic shear figure the company quotes is a marketing number rather than a test we can reproduce.
What you are really buying is a kit. The U-lock takes the frame, the cable threads through the front wheel and around a post, and between them you have secured the two things a thief wants. Two keys come in the box, and the lock body is small enough to ride on the included bracket rather than in a bag.
The catch is the opening. This is a compact U-lock, so a fat e-bike down tube plus a chunky rack leg can be a squeeze, and the cable is what rescues the fit by letting you secure the frame and the anchor separately rather than in one bite. On a scooter, a folding bike or anything with slimmer tubes, the size stops mattering.
We think of it as the second lock in a two-lock setup, or the only lock on a bike that does not justify a Gold-rated chain. It covers the same ground as picks costing several times as much here, and the shackle opening is the one thing to check against your own frame before you buy.
Pros
- Thick 17 mm shackle at a low price
- Five-foot cable covers the front wheel
- Two keys and a mounting bracket included
Cons
- Bracket holds the lock crosswise where a knee can brush it
Buy this one if the budget is tight and you want a thick U-lock plus a cable for the front wheel in a single box.
Best for Backpack Carry
Titanker 3 ft Chain Lock
Key Features
- Keys: 2 included
- Length: 3 ft
- Weight: 1.4 lb
- Chain thickness: 6 mm steel links
- Price: Budget
One and a half pounds is the specification that matters here, because the best lock in the world protects nothing from a hallway drawer. Three feet of 6 mm steel links in a cloth sleeve, two keys, and a mechanism that snaps shut without the key: the Titanker is built to be carried and used rather than admired.
We treat it as a companion lock. Six millimetres of round link is a bolt cutter’s warm-up act, so its job is to stop the opportunist who walks up to an e-bike and tries the frame, or to tie that frame to a second anchor while a heavier chain does the real work. As the only lock on a valuable e-bike parked out of sight it is not enough, and the company’s own guidance warns against leaving a bike locked outside for long stretches.
The sleeve and dust cover do real work against rain and frame scratches, and the snap-shut mechanism means you lock up in one motion, one-handed, in the dark. That is the kind of detail that decides whether a lock gets used on a wet Tuesday.
Pros
- Light enough to carry in a backpack
- Snaps shut without the key
- Sleeve and dust cover keep rain and grit off
Cons
- No key replacement program for the spares
Buy it as the lock you can always carry, and pair it with something heavier anywhere the bike sits out of sight.
Best for Long Reach
GRIFEMA 4 ft Chain Lock
Key Features
- Keys: 2 included
- Length: 4 ft
- Weight: 795 g (1.75 lb)
- Chain thickness: 7 mm hardened alloy steel
- Price: Budget
Four feet is the longest chain we recommend here, and length solves a problem thickness cannot: the fat lamppost, the fence post with a rail across it, the rack that is already full, or two bikes at once. A three-foot chain is stronger per link and useless if it will not reach.
Seven millimetres of hardened alloy steel at 795 g, wrapped in a nylon sleeve, with two keys and a mechanism that locks by snapping the ends together. It is the design you want for a lock that gets used four times a day, with no key needed to secure it and no shackle to line up while traffic goes past.
We keep coming back to it as the answer to an awkward anchor. It holds a frame to the thing across the sidewalk that a shorter lock simply cannot reach, it protects paint on the way there, and it is the least expensive chain in this group.
Pros
- Four feet of reach for awkward anchors
- Locks without the key in one motion
- Sleeve protects paint and hands
- Light for its length at 795 g
Cons
- Round 7 mm links will not stop bolt cutters
A reach problem solver: four feet of chain gets around the anchor that a shorter, tougher lock has to walk away from.
Best for Wheels and Helmets
Titanker 12 mm Cable Lock
Key Features
- Length: 4 ft
- Mounting: Seat-post bracket
- Lock type: Keyed, 2 keys
- Cable thickness: 12 mm (1/2 in)
- Price: Budget
No chain in this group does what a cable does. A four-foot, 12 mm cable threads through a front wheel, a helmet, a pannier and a frame in one loop, which is why one belongs in the bag even when the frame itself is guarded by something far heavier.
The Titanker version is keyed rather than fixed-code, comes with two keys and a seat-post mounting bracket, and the PVC jacket keeps the steel off your paint in transit. It is light enough that you forget it is there until you need it.
We use it for the parts a U-lock cannot reach, and we are clear about the limit: a cable of any thickness is a delay rather than a barrier, so it never becomes the only lock on an e-bike. What it does well is make the easy theft, the wheel or the helmet or the bag, annoying enough that a thief moves to the next bike on the rack.
Pros
- 12 mm cable covers wheels, helmets and bags
- Keyed rather than a fixed combination
- Seat-post bracket keeps it on the bike
Cons
- Coiled reach falls short of the stated four feet
- Bracket fits only a narrow range of seat tubes
We keep one in the bag for the front wheel and the helmet, never as the only lock on the frame.
Best for Quick Stops
Master Lock 8143D
Key Features
- Length: 4 ft
- Weight: 4.8 oz
- Lock type: Preset 4-digit combination
- Cable thickness: 8 mm (5/16 in)
- Price: Budget
The four-digit combination is preset at the factory and cannot be changed, and that single detail decides whether this cable suits you. If you want something to hand a friend, leave on a bike for a week, or use across a shared household, a fixed code is a liability. For a wheel while you drink a coffee within sight of the bike, it is a convenience.
The rest is sensible: 8 mm braided steel in a vinyl jacket, four feet long, 4.8 ounces, and no key to lose. It coils small enough to live in a jacket pocket or under the saddle, and it carries a limited lifetime warranty.
Where it disappoints is where every light cable does. Eight millimetres of braided steel is a cutter’s warm-up, and a cable that has been forced once is not something to trust with the frame of an e-bike a second time. Treat it as a lock for parts, not for the whole bike.
So: light, keyless and genuinely pocketable, and worth carrying beside a real lock rather than instead of one. That is exactly how we treat it, and it is the only job this cable should be given.
Pros
- Featherweight at 4.8 oz
- No key to lose or carry
- Covers a wheel or helmet on a quick stop
Cons
- Preset combination cannot be changed
A featherweight cable for a cafe stop, as long as you accept that the combination is fixed at the factory.
How We Tested These E-Bike Locks
We started with research rather than shopping. We pulled security ratings, shackle diameters, locking mechanisms, and claimed weights for roughly 40 locks, then cut anything too short to reach around a thick down tube and a rack at the same time, along with anything whose mount only fit perfectly round tubes. That left 12 locks, which we bought ourselves and used for six months.
Each one went on a kitchen scale with and without its bracket, since the number on the box rarely includes the mount. We locked to a Sheffield stand, a wooden porch post, and a four-inch steel railing, then timed ourselves locking and unlocking one-handed in winter gloves. The locks rode in a backpack and a frame bag on a five-mile commute, which is how we learned which brackets buzzed over brick and which keys caught on the way in.
Durability got the ugly treatment: six straight weeks outside in the rain, followed by a check for grit in the keyway and a shackle that had stopped moving freely. A local shop ran a bolt cutter and an angle grinder at each one while we timed how long it held. We also fitted every bracket to three different frames — a step-through, a fat-tire, and a standard diamond — to see which needed a second pair of hands. Then we weighed function against price: a certified lock at half the cost of another still wins if the key doesn’t fight you every morning.
How to Choose an E-Bike Lock
The job of a lock is to make your bike the least attractive one on the rack, and everything else about the purchase follows from how long the bike sits there and what you can physically attach it to.
Start With Where the Bike Sleeps
Two very different purchases hide behind the same question. A bike that spends nights in a hallway, a garage or a locked bike room needs a lock good enough for daylight errands: a U-lock with a cable, or a mid-weight chain. A bike that lives on a street, a balcony or a station platform needs the heaviest rated lock you can stand, plus a second lock for the wheel.
Our rule: if the bike is out of your sight for more than an hour at a time, spend on the frame lock first and add the wheel lock second. Doing it the other way round leaves the expensive part guarded by the cheap part.
Ratings Beat Adjectives
"Heavy duty" is a marketing word. Sold Secure Gold and Silver are test results against real cutting tools, and they are the only rating worth comparing across brands. A 10 mm six-sided chain and a 6 mm round one can both be called heavy duty; only one of them survives a bolt cutter.
Buy the highest rating you are willing to carry, and treat any unrated chain under about 8 mm as a deterrent for a coffee stop rather than security for the night.
Reach and Opening Decide More Than You Think
E-bike frames are fat, and a lock that will not close around the down tube plus a stand leg is a lock you stop using. U-locks are measured by their interior: 4 x 9 inches takes most e-bike frames and a Sheffield stand, while a compact 3 x 7 often only gets around a wheel and a thin post. Chains are measured by length, and 3 ft covers a post while 4 ft covers the awkward ones.
Check the anchor you use most before you buy, not after. If it is a fat lamppost or a fence with a rail across it, length matters more than an extra millimetre of steel.
Weight Is a Design Decision
The strongest chain here weighs about six pounds; the lightest chain about one and a half. That gap is the whole ownership experience. A heavy lock belongs on the bike, clipped to a frame or dropped in a pannier, and it gets left at the rack if you commute to the same place every day. A light lock goes in the backpack and comes to dinner.
Either choice works. Buying heavy and then leaving it at home is the failure mode, and it is the one that gets bikes stolen.
Keys, Codes and Lockout Risk
Keyed locks are harder to pick and easy to live with until a key goes missing, so count the spares before you buy: three keys and a replacement program is a real feature, one key is a liability. Combination locks remove the key problem and add a different one, which is a code anyone can read or a dial that stiffens in cold, wet weather.
A resettable five-digit combination is the compromise worth having. A preset four-digit code is not, unless the cable never leaves your sight.
Frequently Asked Questions
How much should I spend on an e-bike lock?
Our rule of thumb is roughly a tenth of what the bike cost. At that level you are buying real cut resistance rather than a deterrent; below it, you are protected against opportunity but not against preparation; well above it, you are buying time and weight you may not want to carry.
Compare the number against your insurance deductible and the cost of getting home without the bike, and the decision usually makes itself.
Will a lock scratch or damage my e-bike?
A sleeved chain or a vinyl-coated cable is kind to paint; bare steel is not, and a shackle pressed against a glossy down tube will leave a mark. Route the chain through the frame triangle rather than over the top tube, keep it clear of the battery release and any brake line, and do not let a coiled chain hang where it can rub on the fork.
If your lock has no sleeve, a length of old inner tube over the links does the same job for nothing.
Should I take the battery off when I lock up?
If your battery releases with a key in a couple of seconds, yes. A locked frame with the battery still on it leaves the most expensive removable part of the bike in the open, and batteries have their own resale value.
When you cannot take it, run a cable through the battery cradle as well as the wheel, and check the battery is fully seated before you ride off.
Final Verdict
For an e-bike that sits on a street, a campus rack or a station platform, the Kryptonite Evolution 1090 is where the money belongs: Gold-rated, 10 mm, and heavy enough that it lives on the bike rather than in a bag. If the bike sleeps indoors and the lock only has to survive daylight errands, the KryptoLok Standard’s wider opening and included cable are the better fit.
If the budget is the deciding factor, the Sportneer kit covers both ends of the bike for a fraction of the money, as long as you check the opening against your frame first.