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Ceramic
From WikiPedalia
- Ceramic-coated rims Some aluminum rims are coated with a ceramic material primarily to improve wet weather braking, and to reduce rim wear that often results when rim brakes are used in muddy/wet conditions.
The ceramic is fairly brittle, and if the rim gets dented even a little bit, the ceramic can flake off. If this happens, the braking will become very rough as the rim grabs/releases at the damaged section. - Ceramic bearing balls
- Most bearing balls are super-hard steel. Lately, some suppliers have been promoting very expensive bearings that use ceramic balls.
These are a silly gimmick, aimed at gullible cyclists with too much money. They have no real benefit in practical use on bicycles.
"A fool and his money are soon parted."
