[QUOTE=Wildcat1971;10980660]
+1 I agree. I dont ever put plastic against my bearings. And only metal that is about the size of the inner race.
I cant see how it would possibly make a difference on this application. The hex and bearing will spinning at the same speed 99% of the time. The hex has a lip the diameter of the inner race of the bearing. I dont run any shims with mine (Proline rear hex) and the anodized finish where it meets the bearing has not discolored. The finish on the inside hub where it meets the outer race of the bearing on the other hand...