Shimano (Cycling) GRX RD-RX817 (Di2) 11s Real Derailleur IRDRX817

Di2 shadow rear derailleur plus of the gravel / adventure component “GRX815” series.
Equipped with a chain stabilizer that is effective to prevent the chain from falling off.
Adjusted clutch tension for gravel.
Rear compatible speed: 11-speed Shift type: Di2 Electric
■ Compatible chain: HG-EV11 / HG-X11
Corresponding low sprocket (minimum / maximum): 40 / 42T
■ Top proquette (minimum / maximum): 11 / 11T
■ Total capacity: 31T
■ Average weight: 318g