An upgrade option for cartridge wheel bearings that offer extremely low friction, improved power transfer, and a service life that far exceeds traditional steel bearings.
- Grade 3 Silicon Nitride balls
- Hand built in Denmark
- Hardened races
- High resistance to poor lubrication
- Kit contains: 2x 61804 2x 61903 2x 61803
- Reinforced polyamide cage and non-contact seals