The Best Locks for E-Bikes

E-bikes are stolen more than regular bikes, and for obvious reasons. They are worth more, they are easy to resell, and the battery alone has a market. A lock is not an accessory on a two-thousand-dollar vehicle. It is part of the purchase.

The uncomfortable truth is that no lock is unbreakable. Every lock buys time and noise, and the goal is to be enough trouble that the thief moves to the bike next to yours. What follows is about buying time honestly rather than buying the feeling of security.

How much to spend

The old rule of thumb is 10 percent of the vehicle's value, and it survives because it roughly tracks reality. On a $2,000 e-bike that is a $200 lock, which sounds absurd until you price the replacement.

A cheap cable lock is not a lock. A pair of hand cutters goes through one in a couple of seconds, silently, and any thief working bikes carries them. A cable is for stopping an opportunist walking off with an unattended bike in front of a shop, and it should never be the thing standing between you and a $2,000 loss.

What to look for

Sold Secure is the rating that means something. It is an independent UK programme that pays testers to attack locks with real tools for a fixed time, and it grades Bronze, Silver, Gold and Diamond. Diamond is the top tier and the one insurers ask for. The important part is that the maker does not award it to themselves. A lock with no third-party rating is asking you to take its word, and marketing words like "maximum security" or "hardened" carry no defined meaning at all. Buy a rating, not an adjective.

Angle-grinder resistance is the newest and most important distinction. For years the security conversation was about bolt cutters and leverage. Then battery angle grinders got cheap, small and quiet enough to carry, and they cut through almost any conventional hardened steel in under a minute. A handful of locks now use abrasive-resistant composite layers that destroy cutting discs rather than resisting them, which turns a one-disc job into a several-disc job in public. Two of the picks here do this. If you park on a street overnight in a city, this is the feature that has actually changed since your last lock.

Shape decides what you can lock to, and that decides everything else. A small U-lock is the most secure shape because it leaves almost no room to insert a jack or a pry bar, but it only reaches a slim post or a proper bike stand. A chain reaches around fat street furniture and awkward racks, at the cost of weight and some leverage exposure. Folding locks split the difference and are the easiest to carry. Before you buy, look at where you actually park, because the most secure lock in the world is useless if it will not close around the only thing there.

Two different locks beat one expensive lock. Thieves carry the tool for the lock they expect. A U-lock through the frame and rear wheel plus a chain or cable through the front wheel means one tool no longer finishes the job, and switching tools in public is exactly the exposure they are trying to avoid. If your budget is $250, two locks at $125 usually buys more real delay than one at $250.

Lock the frame to the immovable object, and get a wheel in there too. The most common expensive mistake is locking only a wheel. Quick-release wheels come off in seconds and the rest of the bike leaves without them. Put the shackle through the rear triangle and rear wheel where possible, fill as much of the U as you can with bike and rack so there is no room for tools, and keep the keyhole facing down and away from the ground.

Take the battery with you when it comes off. A removable battery is a large fraction of the vehicle's value, it is trivially resold, and it is usually held by a lock that is a convenience feature rather than a security one. Carrying it also makes the bike much less attractive to ride away, and it is the single easiest theft deterrent available on most e-bikes.

Register the bike and photograph the serial number now. Recovery rates are poor mostly because owners cannot prove which bike is theirs. The serial is normally stamped under the bottom bracket. Photograph it, note it somewhere you will still have after the bike is gone, and register it with a national database. This costs you five minutes and is the difference between a recovered bike and a bike the police cannot return. Pair it with a tracker if the bike lives outside.

How we picked

Security ratings are Sold Secure's, not ours, and grinder resistance is each maker's claim about their own materials. We have not cut any locks open. Where a lock has no independent rating we say so rather than repeating the marketing.