You are reading a single comment by @Velocio and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@Velocio
I've used this supplier before: http://www.enduroforkseals.com/index.html
They were good.
The bearings are size 6801, and the letters refer to the seal types.
Ceramic is harder than steel, so having steel races means that eventually you'll wear the races before the bearings. So the very best is to have both the races and bearings ceramic, however it's almost needlessly expensive, hybrids (ceramic balls, steel races) are a significant improvement over all steel bearings. And it's reasonably unlikely that parts will ever get to the point of being fully worn before being replaced.