SHIMANO Rear Derailleur RD-RX817, GRX,11-SPEED, 1x11, Di2 pickuponly Rails: Chromoly Rails

Rails: Chromoly Rails

Works fast

as this sits on the hub shell

and a relaxed riding position that keeps you more upright and comfortable in the saddle

275 in3 (XL)

SHIMANO Rear Derailleur RD-RX817, GRX,11-SPEED, 1x11, Di2 pickuponly Rails: Chromoly RailsWith 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 RX817 DI2 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting. and is compatible with mtb cassettes with a 42T low sprocket max. Top sprocket: Max. 11T