# Where is the frame number on a Cube bike? Canonical: https://www.cyclesite.co.uk/trust/frame-numbers/cube Last reviewed: 2026-06-11 **Quick answer:** The frame number on a Cube bike is usually underneath the bottom bracket. On some Cube hybrid and electric models, check the seat tube area near the chainstay, between the chainstays, or near the motor. Look for a unique mix of letters and numbers on the frame itself. Most Cube bike frame numbers are found underneath the bottom bracket, between the pedals. On some Cube hybrid and e-bike models, the number may sit on the seat tube area near the chainstay, between the chainstays, or tucked close to the motor. Cube frame numbers can be stamped into the frame, etched into carbon, or printed on a sticker depending on the model, year and frame material. If you are checking a used Cube, get a clear photo of the full number before you pay. ## Start under the bottom bracket. This is the most common place to find a Cube 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 Cube registration email or paperwork. - With the Cube dealer that sold the bike. ## What a Cube frame number looks like A Cube frame number is usually a unique alphanumeric code. Some owners report serials starting with W0W or WOW, but do not rely on a prefix alone, as the full code is what matters. On aluminium frames the number is often stamped into the frame; on carbon frames it may be etched or printed on a sticker; on e-bikes, do not confuse the frame number with the motor, battery or display number. ### Not the frame number - Cube Aim - Cube Analog - Cube Reaction - Cube Reaction Hybrid - Cube Stereo - Cube Touring - Cube Kathmandu - Cube Attain - Cube Agree - Cube Nuroad - Cube Hyde - HPA - C:62 - 29 inch - 27.5 inch - Bosch motor number - Battery serial number - Shimano or SRAM part code - Tyre size marking - Fork serial number ## Cube e-bikes carry several numbers Cube e-bikes can have several numbers on the bike. The motor, battery, fork and frame may all carry separate identifiers. For stolen-bike checks, resale, insurance and proof of ownership, the frame number is the key one. On some Cube hybrid and e-bike models the number can be awkward to see, sitting close to the motor, the chainstay area or under factory-fitted accessories such as mudguards. Check carefully before assuming it is missing. ## Buying a used Cube 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 Cube 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 Cube can be a brilliant buy, but the frame number is the detail that protects you. ## Frequently asked questions ### Where is the frame number on a Cube Aim? On most Cube Aim hardtail mountain bikes, check underneath the bottom bracket first. If you cannot see it, clean the area and check around the chainstay and seat tube. ### Where is the frame number on a Cube Reaction Hybrid? On a Cube Reaction Hybrid e-bike, check underneath the bottom bracket area first, then check near the motor, between the chainstays and around the seat tube area. ### Where is the frame number on a Cube Stereo Hybrid? On a Cube Stereo Hybrid, start around the bottom bracket and motor area. Also check the chainstay area and original dealer paperwork. ### Where is the frame number on a Cube Kathmandu Hybrid? On a Cube Kathmandu Hybrid, check around the bottom bracket and motor area first. If mudguards, racks or cables hide the number, use a torch and check from both sides. ### Where is the frame number on a Cube Attain? On most Cube Attain road bikes, the frame number is usually underneath the bottom bracket. On carbon versions, look for an etched number or sticker. ### Where is the frame number on a Cube Nuroad? On most Cube Nuroad gravel bikes, start underneath the bottom bracket. If it is not visible, check the rear dropout, chainstay and underside of the down tube. ### Is the Bosch motor number the same as the Cube frame number? No. Many Cube e-bikes use Bosch systems, but the Bosch motor number is separate from the Cube frame number. For bike checks, use the frame number. ### What if the Cube frame number is hidden by a cable guide or mudguard? Remove only what you can safely move, clean the area and use a torch. If you are buying the bike, ask the seller or a Cube dealer to help confirm the number before payment. ### How do I register a Cube bike in the UK? Find the frame number using the locations described above, then record it against your Cube. 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 Cube is worth: https://www.cyclesite.co.uk/value/cube - Stolen Cube bikes: how to check one before you buy: https://www.cyclesite.co.uk/stolen-bikes/guide/stolen-bikes-by-brand-cube - Used Cube prices by model: https://www.cyclesite.co.uk/value/cube - Cube vs Trek: https://www.cyclesite.co.uk/compare-bikes/cube-vs-trek - Cube vs Specialized: https://www.cyclesite.co.uk/compare-bikes/cube-vs-specialized - Cube vs Giant: https://www.cyclesite.co.uk/compare-bikes/cube-vs-giant - Giant Defy vs Cube Agree: https://www.cyclesite.co.uk/compare-bikes/giant-defy-vs-cube-agree - 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/cube