How to Break a Bike Lock When You’ve Lost the Key: Safe, Legal Options
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If you’re searching for how to break a bike lock, chances are you’ve lost the key or forgotten the combination to your own lock. The good news is that you usually don’t need to break it at all. This guide covers the safe, legal options, starting with the easiest.
We don’t give instructions for defeating locks. Cutting tools can cause serious injury, damage your bike, and look exactly like theft to anyone passing by.
Table of Contents
1. Look for the Spare Key or Code
Most U-locks come with two or more keys. Check drawers, old key rings and the lock’s original packaging. For combination locks, look for where you might have written the code, and check if the lock maker’s support pages explain a recovery process for your model.
2. Order a Replacement Key
Many lock makers will cut a new key from the number stamped on your original key, especially if you registered the lock. Kryptonite, for example, explains where to find your key number and sells replacement keys through its order keys page for $12.95 each plus $6.95 shipping. Locks sold with Kryptonite’s Key Safe service get their first two replacements for the shipping fee alone.
This takes time, so it’s the best choice if the bike is locked somewhere safe, like your home or office.
3. Call a Locksmith or Bike Shop
If you need the bike now, a locksmith can remove the lock with the right tools and training. Some bike shops can help too. Expect to be asked for proof that the bike is yours.
Kryptonite’s broken key page says that if a key breaks off inside one of its locks and you need a locksmith, it will send a new lock and refund the locksmith bill when you submit photos of the lock, keys, key number and the bill.
4. Ask the Property Manager
If the bike is locked at your building, workplace or school, staff or security can often help, and may already work with a locksmith. Locks left on racks are sometimes removed by building management under their own rules.
Bring Proof of Ownership
Anyone helping you will want to know the bike is yours. Useful proof includes:
- A receipt or online order record
- Photos of you with the bike
- The frame serial number, usually stamped under the bottom bracket
- A bike registration record, if you registered it
If someone else’s lock is on your bike, or your bike was locked by someone else, contact your local police non-emergency line rather than removing it yourself.
Prevent It Next Time
- Register your key number with the lock maker when you buy it.
- Keep a spare key somewhere other than your main key ring.
- Photograph your keys and key number, and store the photo somewhere safe.
Why Good Locks Are Hard to Break
The same features that lock you out also protect your bike. Thick hardened steel and double-locking shackles are meant to make removal slow and noisy without a key. If your current lock is easy to remove, it may be time to upgrade. See our heavy duty bike locks guide, and read what makes a good bike lock.
- 16 mm hardened max-performance steel shackle for superior cut, pry, and leverage resistance
- Patented anti-rotation features on the shackle to help defend against twist-and-cut attacks
- Highest-security disc-style cylinder — pick- and drill-resistant for maximum lock integrity
- Includes 2 stainless steel keys with ergonomic heads designed to reduce torque and prevent bending or breakage
- Sliding dust cover shields the cylinder from dirt and debris to maintain smooth operation
FAQ
Can a locksmith remove a bike lock?
Yes. Locksmiths can remove most bike locks, and they’ll usually ask for proof that the bike is yours.
How much does it cost to have a bike lock removed?
It varies by area and lock type, so call local locksmiths for a quote. A replacement key from the maker is often cheaper if you can wait.
Can I get a replacement key without the key number?
It’s harder. Check whether you registered the lock with the maker, then contact their support team.
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