Gene from web site provided this great info on figuring out your old trusty Schwinn; Schwinn Bike Dating After 1965, Schwinn serial number sequences, while appearing to beconfusing on first sight, follow several general rules.
If thefirst letter is a "A" through "M" it refers to production month("A" = January, "B" = February, etc.).
The firstletter tells production month, the second tells production year.
Limited Production Schwinn Bikes include Paramount, Letour, and Sting model names produced in the United States.
Many smaller companies were absorbed by larger firms or went bankrupt; in Chicago, only twelve bicycle makers remained in business.
I have a vintage Schwinn Traveler made approximately 1985.
The Paramount serial numbers (1970 - 1979)included a production month letter followed by twonumbers indicating production year (79 = 1970, etc.). WTB: Nothing, unless it's a real cheap local survivor score!
The sequence was changed in 1981 when facilities weremoved to Wisconsin, to include the letter "W" followedby a production month letter and several numbers, thefirst two signifying year of production (81 = 1981, etc.). Le Tour (and Super Le Tour)numbers (1978- on) include the letter "S"with year of production (8 = 1978, 0 = 1980). Sting 20" racing bikes have aproduction month letter "T" signifying that it is a tri-ovalframe (with three frame tube ends ovalized). Imported Schwinn serial sequences depend upon countryof origin. "BICYCLING DON'TS: Stunting, doing wheelies, or 'dirt biking' places stresses on bicycles far above design intentions.
The brakes, shifters, and derailleurs are all of pretty good quality.If the Wife likes it and rides it I will upgrade some things on it as time goes by. But if you expect to take it out of the box put it together and ride it I think you will be disappointed with the performance of the bike due to the poor assembly/tuning of bearings and out of true wheels.The first things I feel are must upgrades are in order of importance are.1. A few hours time, some know-how and a good set of bike tools make all the difference with this bike. I was unsure because the reviews were mixed, but I wanted to get back into bicycling after a long hiatus and this was a great starter road bike.Date Codes occupy the first two, three or four positionsin a serial number.Mass produced Schwinn bikes have been data-coded since1965 by the first two letters in the serial number.