![]() Please feel free to add to, or correct this post. The C tells you that the bikes original frame was built in Cromo, California. The first digit was a letter followed by a one digit number F2 meant June of '82 (using the same code as the bike models above) and these SN's were no longer found on the BB shell, but rather the lug behind it.Īfter 1980 it gets fuzzy for me since I lose interest in mongeese after 1980. Beginning in 1976, the serial number has a C above it. This continued until sometime after March of '81 when the SN just went to one line, dropping the top line completely. Later the "T" was moved to the top line, in front of the "C" for both Team Mongoose and Supergoose: When the team mongoose model was introduced in '78, a "T" was placed in a third row at the bottom, as shown in this pic (you can barely make it out, but it's there) It's proper name is GTAW, or Gas Tungsten Arc Welding. The Racer-X models serial numbers started with an X (example: XB8, rather than CB8) Unique Heliarc weld pattern ('heli arc' is another name for TIG. In early '76 a "C" was added to the top line The earliest models ('75) were comprised of five digit numbers only (see pic) ![]() The next line was simply the sequentially numbered serial number. The third digit was the last number in the two digit year: It is important to know that the serial number chart simply. You can read it from left to right by understanding what each number or letter means based on the bike brand. Some BMX bikes and a few Schwinn bicycles place the serial on the rear dropout. The second digit was the letter code for whichever month the BB shell was manufactured: The bicycle serial number chart includes the meaning of each symbol in your serial number like the month it was made, the year it was made, and the unique model number. A serial number located on a rear dropout. The first digit C stood for Chatsworth (California, where the factory started out) Typically, the Serial Number was on two lines, looking like this: We recommend not including the manufacturer number when registering. ![]() In this picture 200910427-2A is a manufacturer number and not a serial number. (maker of Mongoose) used the same format for all of their bicycle brands (Jag, Roger DeCoster, Moto-Trac, etc.) with a few exceptions. Okay, fine, so maybe there are a few bikes without serial numbers, but this is rare and typical only on hand made bikes or really old bicycles.
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