# Where is the frame number on a Specialized bike? Canonical: https://www.cyclesite.co.uk/trust/frame-numbers/specialized Last reviewed: 2026-06-11 **Quick answer:** The frame number on a Specialized bike is usually underneath the bottom bracket, between the pedals. Look for a stamped code, sticker or barcode label with a unique mix of letters and numbers. Copy the full serial number exactly before using it to check or register the bike. Most Specialized bike frame numbers are found underneath the frame, near the bottom bracket, where the pedal cranks pass through the frame. Turn the bike carefully upside down and look between the pedals. You are looking for a unique serial number on the frame itself. It may be stamped into the frame, printed on a sticker, or shown on a barcode label depending on the model, age and frame material. ## Start under the bottom bracket. This is the most common place to find a Specialized 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 - Under the down tube. - Around the seat tube. - Near the head tube. - Near the rear dropouts, where the back wheel slots into the frame. - On the original purchase receipt. - In the Specialized registration record. - In the original dealer paperwork. ## What a Specialized frame number looks like A Specialized frame number is normally a string of letters and numbers. On many newer Specialized bikes the serial number may appear on a label or barcode sticker. On some bikes it may be stamped into the underside of the bottom bracket area. You need the full unique code, not the model name or part number. ### Not the frame number - Specialized Sirrus - Specialized Allez - Specialized Rockhopper - Specialized Tarmac - Specialized Turbo - Wheel size markings - Tyre size markings - Shimano or SRAM component codes - Shop stock labels - Safety standard numbers ## Buying a used Specialized Specialized bikes hold strong demand on the used market, especially popular models like the Allez, Tarmac, Roubaix, Sirrus, Rockhopper, Stumpjumper and Turbo e-bikes. That also means buyers need to be careful. Before you pay, ask the seller for: - A clear photo of the frame number. - The original receipt or proof of purchase. - Photos of both sides of the bike. - The exact model, size and year if known. - Details of upgrades or replacement parts. - A reason for sale. ## Bottom line The first place to look for a Specialized frame number is underneath the bottom bracket, between the pedals. Clean the area, copy the full code, take a photo and check it before buying, selling or registering the bike. A used Specialized can be a great buy. The frame number is what helps make it a safe one. ## Frequently asked questions ### Is a Specialized frame number the same as a serial number? Yes. Frame number and serial number usually mean the same thing. It is the unique identifying code for the bike frame. ### Where is the frame number on a Specialized Allez? On most Specialized Allez road bikes, check underneath the bottom bracket first. That is the area between the pedals on the underside of the frame. ### Where is the frame number on a Specialized Sirrus? On most Specialized Sirrus hybrid bikes, the frame number is usually underneath the bottom bracket. If you cannot see it there, check the rear dropout, seat tube and dealer paperwork. ### Where is the frame number on a Specialized Rockhopper? On most Specialized Rockhopper mountain bikes, start underneath the bottom bracket. Clean the area first, as mud can easily cover the number. ### Where is the serial number on a Specialized Turbo e-bike? Check underneath the bottom bracket area first. You should also check your original e-bike paperwork, registration details and dealer invoice, as electric bikes may have additional motor or battery numbers that are separate from the frame number. ### Is the motor number the same as the frame number on a Specialized e-bike? No. An e-bike may have separate numbers for the frame, motor and battery. For stolen-bike checks and proof of ownership, the frame number is the main bike identifier. ### What if the Specialized frame number has been removed? Do not buy the bike. A missing, damaged or removed frame number is a major warning sign and can make the bike difficult to register, insure, resell or prove as yours. ### Can I check if a Specialized bike is stolen by frame number? Yes. Use the frame number to run a stolen-bike check before you buy. You should also ask for proof of ownership and make sure the seller details match the bike. ### How do I register a Specialized bike in the UK? Find the frame number using the locations described above, then record it against your Specialized. 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 Specialized is worth: https://www.cyclesite.co.uk/value/specialized - Stolen Specialized bikes: how to check one before you buy: https://www.cyclesite.co.uk/stolen-bikes/guide/stolen-bikes-by-brand-specialized - Used Specialized prices by model: https://www.cyclesite.co.uk/value/specialized - Used Specialized bikes for sale: https://www.cyclesite.co.uk/bike-brands/specialized - Alternatives to Specialized and how they hold value: https://www.cyclesite.co.uk/bike-brands/specialized/alternatives - Cube vs Specialized: https://www.cyclesite.co.uk/compare-bikes/cube-vs-specialized - Trek vs Specialized: https://www.cyclesite.co.uk/compare-bikes/trek-vs-specialized - Canyon vs Specialized: https://www.cyclesite.co.uk/compare-bikes/canyon-vs-specialized - Specialized vs Giant: https://www.cyclesite.co.uk/compare-bikes/specialized-vs-giant - Trek Domane vs Specialized Roubaix: https://www.cyclesite.co.uk/compare-bikes/trek-domane-vs-specialized-roubaix - Specialized Tarmac vs Trek Emonda: https://www.cyclesite.co.uk/compare-bikes/specialized-tarmac-vs-trek-emonda - Frame numbers for other brands: https://www.cyclesite.co.uk/trust/frame-numbers Source: Cyclesite editorial, reviewed 2026-06-11. 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