CeramicSpeed 61903 Standard Bearing - (6903) Length-297 Use of a clutch-style rear

Use of a clutch-style rear derailleur is recommended

Stealth® Phantom rubber offers high-friction grip and non-marking utility on and off the bike

Color Black Flat Protection Sidewall TPI 60 Designed for ebike Yes Defined Color Black ISO Width (mm) 62 ISO Diameter 584 / 650b / 27

FSA (Full Speed Ahead) MegaExo 19 bottom brackets are for use with 19mm diameter spindles

CeramicSpeed 61903 Standard Bearing - (6903) Length-297 Use of a clutch-style rearCeramicSpeed 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