Shimano RD-RX400 GRX 10-speed rear derailleur, Shadow+ double

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.

Shimano GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world. It isn’t a reworked set of road components. It represents a ground up look at how cyclists want to explore their world. Shimano GRX helps you eliminate excuses, instead urging you to try that rough sidetrack or ride that little bit longer. It offers you the option to Explore Beyond.

Technology

SIS Rear Index Shifting System

The system constituents such as the index mechanism built in the shifting lever, the frictionless SIS rear index shifting cable and the smooth action rear derailleur realize the Shimano Index System.

Shimano Shadow RD+

• Less distraction quiet drive train
• Rear derailleur stabilizer reduces chain slap
• Simple solution for chain drop
• Lighter and more efficient than roller type chain device

Features

• Low profile Shadow Plus design 10-speed rear derailleur for fast and precise shifting performance
• Shadow Plus uses a chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shifting
• Compatible with 10-speed HG chains
• Wide gear ratio compatible up to 11-36 Tooth
• For use with double chainset