Originally Posted by
abshipp
Yep, 1985 model. Looks to me more closer to 56cm than 60, that headtube is awful short.
Nice bikes, be aware that this model has the proprietary Shimano "B" shifter boss, so you can only use that style of shifter unless you modify the boss.
Decent tire clearance for a 1980s bike, 28c fit comfortably.
Here are the catalog pages for this model year:
Took a 3rd look - my observational powers are somewhat diminished this week for reasons.
But right you are, probably a 23" based on that and your info - maybe smaller. I have an '85 Peloton and I'm not really into assembling an '85 Schwinn showcase even if I did have space. I can of course facilitate if anyone is interested, it's lurking somewhere in my immediate vicinity.