Build your Shimano GRX RX820 1×12 mechanical gravel groupset: choose chainring (40–46T) and crank length, cassette and rear rotor size. Includes the ST-RX820 right shift/brake lever and BL-RX820 left brake lever with BR-RX820 flat-mount calipers and hoses, RD-RX822-SGS rear derailleur (51T max), FC-RX820-1 crankset, CN-M8100 126-link chain, Deore XT CS-M8100 cassette and two RT-CL800 rotors. Front rotor is 160 mm.
Requires a MICRO SPLINE freehub and a frame-compatible bottom bracket. Bottom bracket, shift cable and housing, and installation are not included. The selected components drawer is the definitive bill of materials.
Image is an illustrative component layout. Exact included parts and sizes are shown in Selected components.
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