CeramicSpeed 61903 Standard Bearing - (6903) Length-297 Machined engineering-grade Delrin inserts for

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CeramicSpeed 61903 Standard Bearing - (6903) Length-297 Machined engineering-grade Delrin inserts forCeramicSpeed 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