Originally Posted by
Wotan
What sorts of tire widths/heights do you think will fit? Do 650A come in the wider sizes (42-50mm). Fenders will be fitted, and I'd like to have it looking quite flush (no large gaps), so the bigger tire the better. The frame appears to have originally been made for 27x1 1/4 (630mm).
Going from 630mm to 584mm or 590mm, you should be able to put very wide tires on the bike, but I think your choice will come down to what you can get a hold of. The Nifty Swiftys on the bike I show measure about 33mm wide. Given that most 27 1 1/4 tires are 32mm wide, you should be able to go a fair amount wider than that.
Neal