CeramicSpeed 61903 Standard Bearing - (6903). CeramicSpeed cartridge bearings are an upgrade option for any cycling discipline. These bearings provide extremely low friction improved power transfer and a service life that far exceeds traditional steel bearings.Grade 3 Silicon Nitride balls
Hardened steel races
Reinforced polymide cage and non-contact seal to keep dirt and moisture out
High resistance to poor lubrication
Can be used for any cycling discipline
Sold as each
Hand built in Denmark
- TECH SPECS
| Bearing I.D. (mm) | 17 |
| Bearing O.D. (mm) | 30 |
| Manufacturer Number | 61903 (6903) |
| Material | Ceramic |
| Thickness | 7 |