Originally Posted by
JohnDThompson
Your 720 would have been spaced 126mm for a 6-speed cluster, and had Gran Compe centerpull brakes and 27" wheels. If you're planning on doing loaded touring you may well want more powerful brakes; Tektro makes several affordable dual-pivot models with various reaches so you could also convert it to 700C wheels as well. Later 720s had cantilever brakes and 700C wheels.
IIRC the 700/27" wheel transition was the other way. While everyone was switching from 27" to 700C, Trek did the opposite on their touring frames. I used to have a 1983 with 27" wheels, now have a '82 frame.