GRX RD-RX400 10 Spd. XX1 Eagle AXS A large head size combines

A large head size combines with innovative V-Matrix Technology to provide a significantly generous sweet spot

Eagle™ PowerLock® and smooth

Dry Weather Lube

stronger retention

GRX RD-RX400 10 Spd. XX1 Eagle AXS A large head size combinesWith 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