Bearing I.D. (mm)_18

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…