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Where is the frame number on a Serial 1 bike?
Find your Serial 1 frame serial number before you buy, sell or register it.
Find your Serial 1 frame serial number before you buy, sell or register it.
Serial 1 e-bikes can have several serial numbers, but the one that matters most for ownership is the main bike frame serial number. Component serials may identify parts, but they do not replace the frame serial. If you are buying used, ask for the frame serial number, not just a motor, battery or charger number.
That number matters. It helps you register the bike, check if it has been reported stolen, prove ownership, value it and sell it with more buyer confidence. Here is where to find it, how to read it, and how to check it before you buy.
Check a Serial 1 frame number
Free, instant, no signup. Enter the number stamped on the frame to check it against a stolen-bike registry and rider-filed theft reports.
Serial 1 says each bike has one main frame serial number, plus other serial numbers for parts and components. Use the general bike frame serial number for ownership, insurance, support and stolen-bike checks.
This is the most common place to find a Serial 1 frame number. It is the part of the frame between the pedals, on the underside.
Make sure you copy the full number. A single missing or misread character can give the wrong result.
If the number is not under the bottom bracket, check these places next:
On older bikes, repainted frames and heavily used bikes, the number can be harder to read. If it has been scratched off, covered, filed down or looks tampered with, treat that as a serious warning sign.
Use the full frame serial number exactly as shown on the bike and paperwork. Serial 1 support guidance says specific digits in the frame serial can even identify the bike’s generation. Do not use a battery, motor, charger, display or component serial as the bike frame number.
Do not use the model name, tyre size, barcode on a shop label, or any number printed on a component. The frame number belongs to the bike frame itself. For example, these are not usually the frame number:
The number you want is the unique frame code that belongs to the frame itself.
The key Serial 1 issue is multiple serials. The bike has a main frame serial number and separate part serials. For ownership, insurance and stolen-bike checks, use the main frame serial number.
A frame number is one of the most useful details on a used bike. It connects a Serial 1 to its owner, its registration record and any stolen-bike reports.
You may need it to:
If you own a Serial 1, take a photo of the frame number and keep it with your receipt. If the bike is ever stolen, that detail can make a real difference.
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:
Red flag. Be careful if the seller refuses to show the frame number, says they cannot find it, gives only a partial code, or pressures you to pay quickly. A genuine seller should understand why you are checking.
Found the number? Run a free stolen-bike check before you buy. Enter the Serial 1 frame number into the checker and look for any matching reports. It only takes a moment, and it can help you avoid buying a bike with a bad history. If the bike looks clear, you can also value it and compare similar Serial 1 bikes for sale.
Report it as soon as possible. You will usually need the frame number, photos, make, model, colour, size, location and any unique marks or upgrades.
Include anything distinctive, such as upgraded wheels, unusual tyres, scratches, stickers, lights, mudguards, racks or replacement parts. The more detail you provide, the easier it is to identify the bike if it appears for sale.
Use the main bike frame serial number, not the battery or component serial. Check the frame and original paperwork.
Ask for the general bike frame serial number and match it with proof of purchase.
No. Serial 1 says the bike has several serial numbers, but the frame serial is the main bike identifier.
Yes. Serial 1 says specific digits in the frame serial can help identify whether the bike is first-generation or current-generation.
Yes. Use the main frame serial number to run a stolen-bike check before buying, and ask for proof of purchase.
Looking for another brand? See the full bike frame number guide.
The quickest place to find a Serial 1 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 Serial 1 can be a brilliant buy, but the frame number is the detail that protects you.
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Bike frame number guide · What bike is this? · What you can check on a used bike · Buying a used bike safely · Serial 1 bikes
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Last reviewed by the Cyclesite editorial team. Published by Cyclesite, Companies House No. 13238473.