# Where is the frame number on a Bulls bike?

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

**Quick answer:** The frame number on a Bulls bike is usually stamped underneath the bottom bracket. On electric models the motor housing can cover the shell, so check the underside of the down tube, and treat the motor number as separate.

On a Bulls, check underneath the bottom bracket first. Bulls is a German brand with a wide range covering mountain, trekking and electric bikes. On the electric models a mid-mounted motor commonly covers the bottom bracket shell, so the number may sit on the underside of the down tube instead.

## Start under the bottom bracket.

This is the most common place to find a Bulls 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 Bulls registration email or paperwork.
- With the Bulls dealer that sold the bike.

## What a Bulls frame number looks like

A unique alphanumeric code stamped into the frame. Bulls does not publish a public serial format, so record the entire code.

### Not the frame number

- Bulls Copperhead
- Bulls Cross Rider
- Bulls Sonic
- Bulls Iconic
- Motor serial number
- Battery serial number
- Frame size
- Safety standard numbers

## Buying a used Bulls

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 Bulls 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 Bulls can be a brilliant buy, but the frame number is the detail that protects you.

## Frequently asked questions

### Is a Bulls 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 Bulls bikes have a frame number?

Most Bulls 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.

### Where is the frame number on a Bulls Copperhead?

On most Bulls Copperhead mountain bikes, check underneath the bottom bracket first, the area between the pedals on the underside of the frame.

### Where is the frame number on a Bulls Cross Rider?

On most Bulls Cross Rider trekking bikes, check underneath the bottom bracket first. If the motor housing covers the shell, look along the underside of the down tube. The number on the motor casing identifies the motor, not the bike.

### What if the Bulls 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 Bulls 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 Bulls bike in the UK?

Find the frame number using the locations described above, then record it against your Bulls. 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 Bulls is worth: https://www.cyclesite.co.uk/value/bulls
- Stolen Bulls bikes: how to check one before you buy: https://www.cyclesite.co.uk/stolen-bikes/guide/stolen-bikes-by-brand-bulls
- Used Bulls prices by model: https://www.cyclesite.co.uk/value/bulls
- Used Bulls bikes for sale: https://www.cyclesite.co.uk/bike-brands/bulls
- 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/bulls