Originally Posted by
JohnDThompson
The real problem is that ball bearings are not well suited to the type of loading expected in a headset. A better solution is roller bearings, as used by Stronglight, Avocet, and others.
This is a common argument, but even roller bearings are not immune from false brinelling. Here is a photo of the roller bearings used by Stronglight and below is an A9 I used on a bike for a couple of years. As you can see there are false brinelling marks on the race; however the good thing about the A9 is the races come with the rebuild kit!
