Working on redoing the back end of my Bringheli jig and I have a question for the more knowledgeable.
When dealing with chainstay length how does a jig measurement factor in axle width? If you use a 120mm hub spacing vs a 130mm hub spacing is there some offset you use to determine your CS length, or is CS length measured as a bisect? For instance is it the center of the BB to the center of the axle measurement that is noted on frame spec drawings, or is that the dimension from center of BB to center of axle along the CS tube?
If its a bisect measurement I would just use the Pythagorean Theorem my BB drop & CS bisect lenght to figure out how far the center of the axle needs to be away from the center of the BB.
Is this the correct mentality? If not please school me. Also what do you find important in the rear end of your Jig?
Thanks for the help.