Originally Posted by
smd4
I'm not sure how to simplify what I wrote.
What do you mean “s
omeone could count two rivets from the same side plate?” What is the “same side plate”? The picture I attached is fairly clear where you start to count from and where you end at. It even fits in your idea of keeping things simple. It’s a whole lot better than measuring the chainstay and doing a bunch of math with charts and derivatives and chainwheel angles.