Originally Posted by goldenskeletons
the longevity of your cranks, the stiffness of your crankarms, durability of your chainring bolts and the overall weight are all practical reasons to get 75's over RD's. i lost a crankarm going through an intersection a while back and now i won't use anything less than Sugino 75's.
-The vast majority of cranks will die from user error not their own weakness. Longevity is therefore pretty much a non-issue
-Stiffness is also a non-issue on most bikes since the frame flex will dwarf crank flex.
-Last I checked chainring bolts are cheap and easily replaceable.
-Weight? what is the difference between 75's and RDs?
Really though if you truly care about any of these factors you're best served with a hollowtech II or something not a sugino 75.
How exactly did you "lose a crankarm," what type was it and would a 75 have faired differently?