I tried searching but couldn't quite find what I'm looking for. I have a 1995 Gary Fisher Tassajara which I converted to single speed. The original crankset is junky and the BB is shot so I figure this is a good time to put on a set of Shimano 600 tri-color cranks I have laying around. Now, I tried test fitting them and the left arm hits the chainstay. The right arm clears, but the 40T ring hits the chainstay.
Obviously I need a longer spindle, but I'm not sure how much more I need. Sheldon's BB database says that my crankset has a chainline of 43.5mm and a length of 113-115mm, but that doesn't help me because the spindle on there now measures about 115mm. The shell width of the frame is 73mm. Any ideas on how to figure out how much more I need before I guess and order something?