Shimano GRX RD-RX812 Rear Derailleur - 11-Speed Long Cage BLK With Clutch For 1x 42t Low Sprocket Max CheckoutTitle=Shimano Alivio SL-M3100-2L Shifter - Left Fits most tubeless rims

Fits most tubeless rims

use in combination with the standard bottom bracket for your chosen frame

24mm forged chromoly spindle

Hollow pins feature a hardened chrome treatment for long-term durability

Transition knobs have been pushed outward

Shimano GRX RD-RX812 Rear Derailleur - 11-Speed Long Cage BLK With Clutch For 1x 42t Low Sprocket Max CheckoutTitle=Shimano Alivio SL-M3100-2L Shifter - Left Fits most tubeless rimsThe Shimano GRX 11 speed rear derailleur has an integrated chain stabilizer mechanism that provides a quieter experience shifting security and precision on mixed terrain. For rides on smooth surfaces the derailleur features an ON OFF switch for the chain tensioner. The Shimano Shadow RD+ adjustable chain stabilizer provides silent and uninterrupted rear shifting on rough terrain. Adjustable Shimano RD+ chain stablizer prevents chain slapping and drops