Shimano GRX rear derailleur RD-RX820 12s R5 Asymmetric Frame: Optimized to balance

Asymmetric Frame: Optimized to balance the uneven forces applied during pedaling for superior power transfer

aerodynamic and oversized tube shapes

X1 carbon outsole with rubber tread

For the design of SILCA Chain Stripper

the Izalco Max 8

Shimano GRX rear derailleur RD-RX820 12s R5 Asymmetric Frame: Optimized to balanceSKU Description Silent and secure rear shifting on rough terrain Adjustable chain stabilizer prevents chain slap and drops SHIMANO SHADOW RD+ Smooth and reliable shifting on mixed surfaces ON OFF stabilizer switch matches terrain Maximum front chainring difference: 17T Top sprocket: Max. 11T Min. 11T Low sprocket: Max. 36T Min. 34T Total capacity: 42T