Shimano GRX RX812 Rear Derailleur 11S Long Cage - Black

With an integrated chain stabilizer mechanism, the Shimano GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain.
For rides on smooth surfaces, the derailleur features and on/off switch for the chain tensioner.
The RD-RX812 DI2 version offers the digital precision of Shimano electronic shifting and synchronized shifting. and is compatible with road cassettes with a 34T low sprocket max.

-Adjustable chain stabilizer prevents chain slapping and drops
-Switch stabilizer on/off to match the terrain
-Gravel-tuned clutch tension
-Silent and uninterrupted rear shifting on rough terrain
-Smooth and reliable mixed surface shifting
-Compatible with current road dual control lever

Specifications:
Brand: Shimano
Model: GRX RX812
Number of Gears: 11
Minimum largest chainring: 40T
Maximum largest chainring: 42T
Minimum smallest chainring: 11T
Maximum smallest chainring: 11T
Total Capacity: 31T
Confirmation: B-Axle_Hollow axle
Color: Gray/Black