# Where is the frame number on a Claud Butler bike?

Canonical: https://www.cyclesite.co.uk/trust/frame-numbers/claud-butler
Last reviewed: 2026-08-14

**Quick answer:** The frame number on a Claud Butler bike is usually stamped underneath the bottom bracket, between the pedals. On older steel frames also check the rear dropouts, where the back wheel sits in the frame, because that is a traditional stamping spot on British-built bikes.

On a Claud Butler, check underneath the bottom bracket first. Claud Butler is a long-running British name with a large number of older steel-framed bikes still in use, and on those frames the number is usually stamped into the bottom bracket shell or the rear dropout. On newer aluminium models it is normally under the bottom bracket.

## Start under the bottom bracket.

This is the most common place to find a Claud Butler frame number. It is the part of the frame between the pedals, on the underside.

1. Put the bike somewhere safe and well lit.
2. Turn it upside down carefully, or place it in a workstand.
3. Look underneath the frame where the cranks meet the bike.
4. Wipe away mud, grease or road dirt.
5. Use a phone torch if the number is hard to read.
6. Take a clear photo before typing the number into a checker.

### If it is not under the bottom bracket

- Near the rear dropouts, where the back wheel fits into the frame.
- Around the seat tube.
- On the underside of the down tube.
- Near the head tube at the front of the bike.
- On the original sales receipt.
- In your Claud Butler registration email or paperwork.
- With the Claud Butler dealer that sold the bike.

## What a Claud Butler frame number looks like

A unique alphanumeric code stamped into the frame. Claud Butler does not publish a serial format, and the marking style varies a lot across the decades this name has been in use, so record the whole code exactly as you find it.

### Not the frame number

- Claud Butler Legend
- Claud Butler Explorer
- Claud Butler Urban
- Claud Butler Levade
- Claud Butler Cape Wrath
- Frame size
- Tubing decals such as Reynolds 531
- Shop stock labels
- Safety standard numbers

## On an older frame, check the dropouts too

British frame builders often stamped the serial into the rear dropout rather than the bottom bracket shell. If you have an older Claud Butler and the shell is blank, look closely at the flat metal faces where the rear wheel bolts in, and at the underside of the seat tube near the shell.

## Buying a used Claud Butler

A clean-looking bike is not always a safe buy. Before you pay, ask the seller for a clear photo of the frame number and check it against stolen-bike records. You should also ask for:

- The original receipt or proof of purchase.
- The seller’s name matching the receipt where possible.
- Clear photos of the bike from both sides.
- A photo of the frame number.
- Any service history.
- Details of upgrades or replacement parts.

## Bottom line

The quickest place to find a Claud Butler frame number is underneath the bike, near the pedals. Look for a stamped code or barcode sticker, copy the full number, then check it before you buy, sell or register the bike. A used Claud Butler can be a brilliant buy, but the frame number is the detail that protects you.

## Frequently asked questions

### Is a Claud Butler frame number the same as a serial number?

Yes. Most people use frame number and serial number to mean the same thing. It is the unique identifying code attached to the bike frame.

### Do all Claud Butler bikes have a frame number?

Most Claud Butler bikes have a frame number or serial number. Check the locations described above first; on older frames the marking can be shallow or worn, so clean the area and check in good light before concluding it is missing.

### What if the Claud Butler frame number has been removed?

Do not buy the bike. A removed or damaged frame number is a major red flag. It may make the bike harder to register, insure, resell or prove as yours.

### Can I check if a Claud Butler bike is stolen by the frame number?

Yes. Use the frame number to run a stolen-bike check before buying. You should also ask the seller for proof of ownership and check that the details match the bike.

### How do I register a Claud Butler bike in the UK?

Find the frame number using the locations described above, then record it against your Claud Butler. It is free, and you need an account so we know where to send the alert. If that exact number is ever reported stolen to us, we email you. If anyone then lists a bike carrying it, the listing is hidden until the seller proves it is theirs.

## Related pages

- Free stolen-bike check: https://www.cyclesite.co.uk/stolen-bikes
- What a used Claud Butler is worth: https://www.cyclesite.co.uk/value/claud-butler
- Stolen Claud Butler bikes: how to check one before you buy: https://www.cyclesite.co.uk/stolen-bikes/guide/stolen-bikes-by-brand-claud-butler
- Used Claud Butler prices by model: https://www.cyclesite.co.uk/value/claud-butler
- Used Claud Butler bikes for sale: https://www.cyclesite.co.uk/bike-brands/claud-butler
- Frame numbers for other brands: https://www.cyclesite.co.uk/trust/frame-numbers

Source: Cyclesite editorial, reviewed 2026-08-14. HTML version: https://www.cyclesite.co.uk/trust/frame-numbers/claud-butler