Shimano GRX RD-RX400 10-Speed Shadow+ Rear Derailleur - For Double

With an integrated chain stabilizer mechanism, the Shimano GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain.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 worldLow profile Shadow Plus design 10-speed rear derailleur for fast and precise shifting performanceShadow Plus uses a chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shiftingCompatible with 10-speed HG chainsWide gear ratio compatible up to 11-36TFor use with double chainsetWeight: 303gFor rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner allowing you to adapt to the type of surface ahead.  The adjustable chain stabiliser prevents chain slapping and drops and gives you silent and uninterrupted shifting on rough terrain.