Specialized serial numbers typically start with the prefix “WSBC,” “WUD,” “STT,” or “STE.” If you don’t know where the bottom bracket shell of the bike is, simply turn the bike upside-down and the bottom bracket is the part of the frame that the cranks run through. How do you decode a specialized bike serial number? What gear should I bike in on flat road?.How do I know if my bike is 10 or 11 speed? I was wondering if there was a way to decode the serial number on a Specialized bike.How can I tell if my Trinx bike is real?.Remember, a bicycle can be made the year before for the following year. Determine with the color (USA and Europe have different colors) and parts in the catalog. Once finding out the year, cross reference with the correct catalog to find out which model you have. Where is the manufacture date on a serial number? The serial number is the key to finding out what year cannondale you have.How many digits are in a serial number?.Do Specialized bikes have serial numbers?.How many digits is a bike serial number?.How can I tell what year my Specialized bike is?.How do you read specialized serial numbers?.How do you decode a specialized bike serial number? Specialized serial numbers typically start with the prefix 'WSBC,' 'WUD,' 'STT,' or 'STE.' If you don't know where the bottom bracket shell of the bike is, simply turn the bike upside-down and the bottom bracket is the part of the frame that the cranks run through.