Not exactly vintage but I am wondering what my options are with this road bike. I picked it up on craigslist a while back ($100 with full 105!!!) and it needed work, but finally it has new cables, housing, and tape, Easton drop bars and stem, CF seatpost, Terry Saddle, and Ultegra 8sp bar-end shifters. Right now I just use the friction shift mode since the bike is a 2x7.
I am wondering if I can just buy an 8 sp cassette like this one and just swap it out? Derailleur is a shimano105.
Basically I'm just not sure if the spacing is right, the rear dropouts are 126mm or thereabouts.
I am also curious about this because I'm interested in eventually getting brifters, but I don't know of any 7 speed brifters.