So i just purchased some Sugino RD cranks from harris and got the 165mm, figuring that with the shorter arm length i'd be less likely to strike the ground on a turn. I get them in today and realize that although they are shorter than my 170mm when judge from hole to hole, they are actually 10mm longer overall if you measure to the end of the arm. so overall, old cranks = 180mm, sugino rd=190mm.
obnoxious