Shimano GRX RD-RX812 Rear Derailleurs Road po-amplidware42-124 EnergyCell™+ is a high-recoil midsole

EnergyCell™+ is a high-recoil midsole composition that provides significant cushioning and durability as well as exceptional energy return

Fully recycled materials

while the laid-back silhouette keeps you comfortable from morning to night

All boards leave the factory ready to ride with de-tuned tip + tail

The Italian sole manu­facturer has been one of the leading brands of high-quality soles for many years

Shimano GRX RD-RX812 Rear Derailleurs Road po-amplidware42-124 EnergyCell™+ is a high-recoil midsoleGRX 11 speed rear derailleur for 1X cranks Adjustable chain stabilizer prevents chain slapping and drops Gravel tuned clutch tension can be toggled ON OFF to match the terrain Low sprocket: Max. 42T Min. 40T Top sprocket: 11T Attributes Max Front Difference Single chainring only Maximum Cog 42T Minimum Cog 11T Primary Color Grey Cage GS RD Capacity 31T RD Spring Type Shadow Plus RD Weight 267g Speed 11 Mount Standard