Why checking matters before you buy
Buying a used bike that turns out to be stolen is a bad outcome twice over. A stolen bike can be reclaimed by its legal owner, which means you can lose both the bike and the money you paid for it. A two-minute check before you buy is the simplest way to protect yourself, and it costs nothing.
The good news is that the checks are quick and easy to do, and a genuine seller will not mind you doing them. Anyone who resists a straightforward frame-number check is telling you something.
Find and check the frame number
Every check starts with the frame number, the unique code stamped into the frame. Ask the seller to send it to you before you travel to view the bike. Then run it through Cyclesite's free stolen-bike check against UK stolen-bike databases. If the bike has been reported stolen and logged, the check flags it.
When you view the bike, confirm the frame number stamped on the frame matches the one you were sent and the one in the advert. Our frame number guide shows where to find it on different bikes. A number that has been filed off, altered or does not match is a reason to walk away.
Proof of ownership and paperwork
Ask the seller for the original receipt or proof of purchase, and for a couple of photos of them with the bike. A genuine owner usually has some history: a receipt, old service records, or photos from rides. Missing paperwork on its own is not proof of theft, plenty of honest sellers have lost the receipt, but it does raise the importance of the other checks.
Cyclesite Tip. Run the frame number before you travel to view a bike. It saves a wasted trip and stops a good deal turning into a bad buy.
Red flags that a bike may be stolen
No single sign is proof, but several together mean you should walk away:
- A price that is well below what the bike should sell for.
- A seller who will not meet at a home address or wants to hand the bike over somewhere neutral in a hurry.
- Vagueness about the bike's history, where it came from or how long they have owned it.
- A frame number that is filed, damaged, painted over or does not match the advert.
- Pressure to pay quickly, in cash, or to send a deposit before you have seen the bike.
Buying safely once it checks out
Once the frame number checks out and the bike matches its advert, buy in a sensible way. Meet in person, pay in a traceable way rather than cash where you can, and keep a record of the sale. Our buying safely guide covers this in full, and the used bike inspection checklist covers the mechanical side.
Buying on Cyclesite removes the theft check entirely, as every bike listed on the platform is checked against UK stolen-bike databases before it goes live. You can browse used bikes with that step already done for you.
Common questions
How do I check if a used bike is stolen before buying it?
Ask the seller for the frame number before you travel, run it through a free check against UK stolen-bike databases, then confirm the number on the bike matches when you view it. On Cyclesite every listing is already checked before it goes live.
Can I get in trouble for buying a stolen bike?
If a bike turns out to be stolen it can be reclaimed by its legal owner, so you can lose both the bike and the money you paid. Checking the frame number against UK stolen-bike databases first is the simplest way to protect yourself.
What if a bike has no frame number?
Most bikes have a frame number stamped under the bottom bracket or on the frame. A missing, filed or altered number is a serious warning sign and a good reason to walk away from the sale.
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