Shimano GRX RD-RX810 11-Speed Rear Derailleur Technology_Spherical With an incredible variety of

With an incredible variety of rim profiles in the market

42mm and 50mm extensions

SHIMANO 105 5500 Series

works with both 10-50t and new 10-52t cassettes

Compatibility and safety information for tubeless ready tires (XX-C = crochet-type rims [hooked]

Shimano GRX RD-RX810 11-Speed Rear Derailleur Technology_Spherical With an incredible variety ofSHIMANO GRX Rear Derailleur 11 speed (34T max low sprocket) RD RX810 SHIMANO GRX Rear Derailleur SHIMANO SHADOW RD+ 34T max low sprocket 11 speed With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON OFF switch for the chain tensioner. The RD RX810 rear derailleur is compatible with road