'77 Schwinn -> Sora or better components ?!?
I suspect I'll have to update this with some measurements once I get home and can take the bike apart further, but here goes.
I've got a '77 ('76 accoring to serial number but supposedly they didn't quite make these in the 76 model year) Schwinn Sportabout (steel frame) it's currently using SunTour front and real derailleurs w/a 10 speed setup.
Ignoring the technical difficulty, would it be humanly possible for me to convert this to Sora or better road components? I'll try to get some data on the bike to figure this out better, but this is what i'm guessing i've got to do.
1) replace hub (i.e. rebuild at least the rear wheel) (I have 27" wheels, is this possible?) (would it be cheaper to try to find pre-built wheels)
2) cold set the rear fork for a larger hub (tough, but after reading sheldon brown, I'm convinced I could do it)
3) replace possibly the entire crankset (I think i'm going to hit the most incompatability here)
4) replace shifters/reroute cables/replace brakes (pain in the rear but should be totally possible right?)
also, any idea (ballpark figures are ok) how much a more or less full set of sora/tiagra/ultegra components are going to run?