SHIMANO GRX RD-RX820 12-speed rear derailleur Left shift lever and ultralight carbon build come

and ultralight carbon build come together for a seamless blend of comfort and performance — an open invitation to explore without limits

Aluminium cage

the paint surface of the bicycle is not damaged

100% Satisfaction:ROCKBROS is committed to ensuring customer satisfaction with our photochromic sunglasses

The result: less and controllable understeer

SHIMANO GRX RD-RX820 12-speed rear derailleur Left shift lever and ultralight carbon build comeGroup: GRX Series: RX820 Model: RD RX820 Technology: Top Normal Rear gears: 12 speed Rec. Chain: HG 12 speed Total capacity: 42 teeth Max. Difference at the front: 17 teeth Max. Largest sprocket: 36 teeth Min. Largest sprocket: 34 teeth Max. Smallest sprocket: 11 teeth Min. Smallest sprocket: 11 teeth Area of application: Gravel Road Cyclocross Mounting: Direct mount