Shimano RD-RX815 GRX Di2 2x11-SPEED Rear Derailleur Bike Accessories Brand_Terry providing a smoother ride and

providing a smoother ride and allowing riders to maintain their most efficient aerodynamic position for extended periods

the IA 16 ensures smooth and reliable shifting across its 11-speed cassette

Countless new designs are scrutinized

The WING/10a offers the greatest fit versatility of any alloy basebar we’ve previously made

Steep seat tube and moderate head tube balance for comfort and speed

Shimano RD-RX815 GRX Di2 2x11-SPEED Rear Derailleur Bike Accessories Brand_Terry providing a smoother ride andCage Length N A Total Capacity 38T Max Front Difference 17 Color SERIES COLOR Average Weight 287g Mount Direct attachment (conventional) Direct mount compatible Number Of Pulley Teeth 13 Series GRX Generation RX800 Max Low Sprocket 34 Min Low Sprocket 30 Rear Speeds 11 Top Normal Spring Type Shimano Shadow RD+