Bike frame numbers

What is a frame number?

A bicycle frame number, also referred to as a bicycle serial number, is a unique code given to most bikes when they are manufactured. Similar to vehicle registration numbers, they allow bikes to be uniquely identified.

Frame numbers are normally up to 10 alphanumeric characters in length and will either be etched into the bike or will be displayed on a sticker.

Where can I find my bicycle's frame number?

Frame numbers can normally be found on the underside of a bike’s frame. If you can’t find it on the underside of the frame, you may be able to find it on the diagonal brace close to the seat tube or close to the chain stay.

Please see the diagram below for reference:


Where to look:

1. Underside of crank

2. Headset

3. Rear stays

4. Seat down tube next to crank

5. Top of crank

Why is a frame number required?

Frame/serial numbers are required by most cycle insurance providers as it helps speed up the claims process, as well as helps prevent fraudulent claims being made.

I can’t find the frame number, can I still buy cover?

Some older and more specialised bikes may not come with a frame number. If you’ve checked the areas highlighted above and you still can’t see a frame number, please email us at and we’ll be happy to help.