Originally Posted by bostontrevor
There are exceptions to that rule, but not enough to make it worth trading off the overall stiffness and strength of the bike.
Correct, so now we have come full circle. Weight reduction on rotational (dynamic) components gives greater benefit to the overall package, then simply changing to lightweight static components. Dynamic components benefit because they are in effect, moving twice - once as part of the overall movement as part of the entire bike, and secondly as part of their independant rotational movement.