CeramicSpeed 61903/18 Standard Bearing. 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) 18
    Bearing O.D. (mm) 30
    Manufacturer Number 61903/18
    Material Ceramic
    Thickness 7

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