How to find a bicycle frame number
Where is the bicycle frame number?
Most bicycles have a frame number stamped into the metal under the bottom bracket (turn the bike upside down and look under the pedals).
Occasionally the frame number will be on the inside of the chain stay or on the down tube or top tube, but if you still can't locate it that's because there isn't a standardised place for bike makers to put it. Scan every part of your bicycle's frame, but please note that 6-digit numbers starting in BS or EN are codes identifying technical standards and NOT the frame number.
If your bicycle has a carbon frame, the number will be etched into the surface or displayed on a sticker.
What if my bicycle doesn’t have a frame number?
Don’t worry. Some older bikes and carbon fibre frames do not have numbers so you will need to fit your cycle with an identity tag.
The easiest and most effective way to create your own frame number is to use the Datatag system.
The Datatag system includes UV etching, tamper-proof QR code stickers plus micro dots to mark components.
The etched code is visible only when illuminated by a UV torch of the kind carried by British police. The micro dots also include the same code and can be applied to every valuable component. You can buy the Datatag system online here.
Why do I need to know the bicycle frame number?
Few, if any, cycle insurers now ask for a bike’s frame number. Instead, they tend to rely on a sales receipt or valuation as proof of purchase.
Still, it’s worth noting your frame number down. In the event of a theft, it allows the police to identify it as yours if they manage to recover it.
Why are bicycle frame numbers in different places?
Because there’s no single industry standard. Manufacturers put them where it suits their production process and the frame design. Some brands have also moved the location over time, or used more than one spot on different models.
On lightweight frames, sometimes there’s a practical reason for the location of the frame number. Stamping a thin tube can risk weakening it, so the number is marked on thicker areas such as the bottom bracket or head tube.
Frustrating if you’re on your hands and knees looking for where the frame number is on your particular bike, but that’s why it varies.
Does a bicycle frame number mean anything?
Yes, but what it reveals depends on the maker. A frame number is a unique alphanumeric code for your bike that might record the brand name, production location, date of manufacture, and frame material.
Still stuck?
Please call us on 0333 000 1234 or email customercare@eta.co.uk and we will be happy to help.