Originally Posted by
Earth1tree23
I also thought 118 was for triple and 109.5 for double, same as you. My main worry is whether a 109.5 Octalink crank will sit on the same distance from the BB tube edge as a 109.5 square taper crank. I pressume it would, but then I am not sure. Have you installed yours yet? Does it work fine? No rubbing on rear stay?
you're comparing apples to oranges. different cranks are designed to take different spindles, but with the same general guidelines for chainline.