Originally Posted by
rpenmanparker
Not one which is important at bicycle crank rotation speeds. Just a difference in cost, one of which (ceramic) is inflated beyond all reason. It is just rale and pillage.
So why are you replacing the bearings? Just bored?
Noisey ..... it's time.
Not impressed with SPECIALIZED stock bearings.
Headset was contaminated & replaced 4 months ago with upgrade bearings.