Check the last two characters in the date code. If they are 'JD,' Schwinn manufactured the bike in 2004. If they are 'JG,' Schwinn manufactured the bike in 2007. Classic StingraysLocate the bike's serial number. It will be on the head tube, the A-frame or the seat tube.Wipe dirt and oil from the serial number, if necessary, so you can read it accurately. Write it down.Call a Schwinn representative and tell her the serial number. She will be able to tell you the year the bike was made.

1. Schwinn Taiwan Serial Numbers

Schwinn Taiwan Serial Numbers

Otherwise, you can find online databases that match Schwinn serial numbers to manufacturing dates.