CeramicSpeed 61903 Standard Bearing - (6903) MFPN=TA2126B The binding release function is

The binding release function is thus more reliable and effectively counters unwanted early release

Sealant compatible tubeless

Top-Close clamp design

Very good when warmer than 0°C and relatively fine grained snow

CeramicSpeed 61903 Standard Bearing - (6903) MFPN=TA2126B The binding release function isCeramicSpeed 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