heres something thats been making me wonder...
I have an 89 GT Freestyle Tour frame, usa made, from 1989 - and it has u brake lugs under the chainstays... I know that some haros, I think the rs2 also had u brake mounts for a while in the 80's....
I remember owning from new a 91 gt freestyke tour frame that had caliper mounting only... so im wondering, why did manafacturers put u brake lugs on in the late80's, [which obviously give you better braking peformance - still used today!] then revert back and take a backwards step in my opinion by taking them off again - i remeber waiting for u brake lugs to come back in in the early 90's so I could actually stop my bike again!