Yea, I did a search and didn't come up with anything defining the actual formula to get the size I needed. I’m 5'9" my crotch to the ground is 31.5" or 80cm. The gear I'm going with is a triple 30-42-52, 12-25. Is there some sort of a formula to find the correct arm? I'm trying to do as much research as possible before finalizing this order to make sure I get everything correct.
Thanks