Here are some example numbers: 0465228 - F106791 - EB37868 What a serial number can tell you Schwinn serial numbers commonly have one of three formats: In other words, it will not be found on a bike component (like a handlebar or a pedal). Note: The serial number will always be found on the actual frame of the bike. The serial number can typically be found in one of three places on a Schwinn made bicycle. All serial number records before 1948 were lost in a factory fire. Notes: This tool works for Schwinn bikes from 1948 to 1982. This tool searches a database of Schwinn serial numbers and if it finds a match to your serial number then it will display the information available for your bike.