Originally Posted by
Epstein
The iron knuckles are tied to the KW V3's, not the RPF-1's.
The difference between the iron/z32 uprights and the RPF1/FN01RC is about the same, weight wise. I'd still do the lighter wheels with heavier uprights (as opposed the the way it is now) because while they're both unsprung weight, the wheel is also inertial and affects acceleration.
The wheels are chrome plated according to the guy, so I'm not sure how heavy they are. I need to get more info from the guy and see whats up.