I recently picked up a used frame (a custom frame from Belgium, spaced 126mm) which has the canti studs spaced at about 63mm apart, not the 80mm of frames from the early 1990s and beyond.
I'm having trouble finding a modern brake which works on this frame as there is not enough vertical pad adjustment and the pads hit the tire. I'm currently using an old set of LX cantis which are a PITA to adjust and find decent pads for.
My question is this; What was the canti stud spacing on early to mid 1980s Cyclocross frames? Was it 63mm, or do I just have an oddball frame? Thanks.