Originally Posted by
mack_turtle
there is no formula. I've not found anything more simple the method described on this
Park Tool page. I know "engineers" think everything can be broken down to a theoretical equation, but mechanics don't waste their time with that. the only way to do it right is to do it on the bike. measure twice, cut once.
on the above Park Tool Page, #6 offers an equation for determining chain length. As an engineer, I also appreciate formulas.