Originally Posted by Boostgod
Bumping an old thread because I am considering aluminum c hubs and spindles because I keep breaking them.
If you go aluminum, get the knuckle and c-hub. With just the knuckle you end up breaking the c-hub. With both, the arm becomes the weak point and most arms are not very weak, thus less likely to break. Another reason, not mentioned here, for getting the knuckles and rear uprights in aluminum, they keep the bearings more true and aligned than plastic and will not melt down in case of a seized bearing.