Shimano GRX RD-RX400 Rear Derailleur 10 Speed 36T Max Medium Cage Shadow+ Nutrition 3 structures available: Standard

3 structures available: Standard

Integrated NFC Medical ID and RECCO®

Convert your tubeless ready rim with this universal high quality tape

GX Transmission Flattop chain

Shimano GRX RD-RX400 Rear Derailleur 10 Speed 36T Max Medium Cage Shadow+ Nutrition 3 structures available: StandardWith 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. FEATURES Silent and uninterrupted rear shifting on rough terrain Adjustable chain stabilizer prevents chain slapping and drops SHIMANO SHADOW RD+ Smooth and reliable mixed surface shifting Switch