
They’re usually referred to as a bicycle serial number, but also at times called a “frame number.” They are stamped onto the frame of a bike and range from six to ten digits long.īike Index is a global bicycle registry combined with a stolen bike recovery platform. Most (but not all) bicycles have a serial number. What might happen, however, is that there’s no serial number there. So, turn your bike around and look for the spot where the two pedal cranks join. Your bike’s serial number will most likely be found underneath the bike’s bottom bracket. Where do I find the serial number on my bike? Check for the serial number on the headset at the front of the bike (2) or the rear stays (3). Simply turn your bike upside down and record the number. Most bicycle serial numbers are located under the bottom bracket where the two pedal cranks come together (1).

