# Where is the frame number on a FOCUS bike? Canonical: https://www.cyclesite.co.uk/trust/frame-numbers/focus Last reviewed: 2026-06-11 **Quick answer:** The frame number on a FOCUS bike is most likely to be underneath the bottom bracket. If it is not there, check the down tube, seat tube, head tube, chainstay and rear dropout. There is no FOCUS-specific prefix to count on, so use the full number shown on the frame. Check underneath the bottom bracket first on a FOCUS, between the pedals. If the number is not visible there, check the down tube, seat tube, head tube, chainstay and rear dropout. There is no single published FOCUS serial prefix or guaranteed location to rely on, so do not trust a guessed code. Use the full number on the frame and match it with the seller’s invoice, dealer receipt or registration record where available. ## Start under the bottom bracket. This is the most common place to find a FOCUS 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 FOCUS registration email or paperwork. - With the FOCUS dealer that sold the bike. ## What a FOCUS frame number looks like A FOCUS frame number should be a unique alphanumeric code on the frame. It may be stamped, etched or printed on a label depending on the model, age and frame material. On FOCUS e-bikes, record the frame number separately from the motor, battery and display numbers. Those parts can have their own identifiers, but they are not the bike frame number. ### Not the frame number - FOCUS Izalco Max - FOCUS Paralane - FOCUS Mares - FOCUS Atlas - FOCUS Jam - FOCUS Thron - FOCUS Sam - FOCUS Raven - FOCUS Aventura - FOCUS Planet - JAM² - THRON² - Bosch motor number - Fazua system number - Shimano motor number - Battery serial number - 700c - 29 inch - Shimano or SRAM component code - Fork serial number ## Watch the motor-number trap FOCUS has a strong e-bike range, so the main check is avoiding motor-number confusion. If a seller sends only a Bosch, Fazua or Shimano drive-system number, ask for the frame number on the bike. ## Buying a used FOCUS 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 FOCUS 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 FOCUS can be a brilliant buy, but the frame number is the detail that protects you. ## Frequently asked questions ### Is a FOCUS 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 FOCUS bikes have a frame number? Most FOCUS 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 FOCUS Izalco Max? Check underneath the bottom bracket first. On carbon frames, look carefully for a label or lightly marked code. ### Where is the frame number on a FOCUS Atlas? Start underneath the bottom bracket. Gravel bikes can hide the number under mud or frame protection. ### Where is the frame number on a FOCUS Jam? Check the bottom bracket and lower frame area first, then the seat tube and rear dropout. ### Where is the frame number on a FOCUS JAM²? Check the frame number separately from the motor and battery numbers. Start around the bottom bracket, motor area and down tube. ### Is the motor number the same as the FOCUS frame number? No. Use the frame number for stolen-bike checks, ownership records and resale. ### What if the FOCUS 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 FOCUS 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 FOCUS bike in the UK? Find the frame number using the locations described above, then record it against your FOCUS. 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 FOCUS is worth: https://www.cyclesite.co.uk/value/focus - Stolen FOCUS bikes: how to check one before you buy: https://www.cyclesite.co.uk/stolen-bikes/guide/stolen-bikes-by-brand-focus - Used FOCUS prices by model: https://www.cyclesite.co.uk/value/focus - Used FOCUS bikes for sale: https://www.cyclesite.co.uk/bike-brands/focus - Frame numbers for other brands: https://www.cyclesite.co.uk/trust/frame-numbers Source: Cyclesite editorial, reviewed 2026-06-11. HTML version: https://www.cyclesite.co.uk/trust/frame-numbers/focus