Originally Posted by
lechat
Neither. Only mentioned cranks because The Sram Rival one requires so much force to snug up, the first time you install one, you think something is wrong with it. Evidently the spec is for King Kong size torque, so a wrench the 1st go around would ease any doubts.
Been working on things since 'round age 12 when I got my 1st Honda motorbike. You develop feel. I don't break bolts, crush carbon and things don't slip or work loose. Hard for a cassette ring to loosen unless you roll backwards a lot and the fine threads on a BB shell I trust to feel and a little loctite blue.
I think it may be possible to break fibers internally, but be very difficult to see externally. If that is the case, you wouldn't know.