I have the following Schwinn that I'd like to fix up a little bit to enjoy riding but I need to know what I have first. I believe this to be a 1989 or 1990 model year Sprint.

Also, if anyone could help identifying some of the components shown. Simply as stock (originally manufactured with the bike) or aftermarket. I'm not going for a hellbent OEM restoration or anything, I'd just like to figure out what were original components and what are not when I go to service/update.

Thanks for any help you may be able to offer.