Like Ceramic Hybrid, Zero Ceramic use a combination of ceramic (Silicon Nitride - Si3n4) balls and steel races, except they are of higher Grade 3 quality. The races are also black oxide treated and ground toa mirror finish which prevents corrosion and provides near perfect efficiency and tolerances.
- Bearing Code: 688
- Dimensions: 8mm x 16mm x 5mm
- ABEC: 5
- Grade: 3
- Seals: VV
- Grease: Kyodo Yushi PS-2
- Application: Hubs, Bottom Brackets
- Weight: 3.10g