Originally Posted by
w00die
Yes it is a 6-speed freewheel. I even researched it by looking at the original brochures at
http://www.vintage-trek.com/TrekBrochures.htm
Oddly enough it shows the 84' 620 and 720 had 6-speed freewheels and for some reason in 85' they came equipped with 5-speed freewheels. Although it seems backwards from everything I can see they went back to 5-speed freewheels in 85'.
Thanks for your inquiry, it lead to me learning something odd about Trek.
Also, yes I am aware that if I go to 700's I will need to cold set my frame to 130. I read up on that also.
Have a great one.
The bolded part is not correct. There are plenty of sources of 700c wheels with 126mm spacing that use a freewheel and can run a 6 or 7 speed cluster. The only limiting factor between using a 700c or 27" wheels will be the reach of your brake arms and the pad position.