Shimano GRX rear derailleur RD-RX820 12s R5 Crafted with Q-SKIN® yarn infused

Crafted with Q-SKIN® yarn infused with silver ions

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

X1 carbon outsole with rubber tread

For the design of SILCA Chain Stripper

This T-Tray mounting system allows for quick-release style attachment of lights or cameras underneath the mount

Shimano GRX rear derailleur RD-RX820 12s R5 Crafted with Q-SKIN® yarn infusedSKU 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