Originally Posted by
fvernon
I went to take a look--it's an odd decal set that has seen some age but doesn't seem right. sport-touring frameset with a 26.8mm seatpost. I have no reason to doubt it's a Schwinn, and based on the paint, dropouts, & seatpost cluster, it looks to be an '86 Prelude. The current owner says that the person he got it from raced--maybe this was a winter trainer.
SN begins B7, but I can't make out what's after that.
The decals most closely resemble a 1983 Schwinn le tour.
The serial number starting with B7 is a frame manufactured in February 1987.
As you have noted the frame looks very much like a Prelude model.
Edit: The serial number is from Greenville, Mississippi.