Rear derailleur Shimano GRX RD-RX812 SH+ 1x11-speed

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. The RD-RX812 rear derailleur is compatible with mtb cassettes with a 42T low sprocket max.Adjustable chain stabilizer prevents chain slapping and dropsSwitch stabilizer ON/OFF to match the terrainGravel-tuned clutch tensionSilent and uninterrupted rear shifting on rough terrainSmooth and reliable mixed surface shiftingCompatible with current road DUAL CONTROL LEVERWeight: 267 g Cable adjuster Compatible chain: HG-EV 11-speed/HG-X11Direct attachment (Conventional) Fluoric coated 4 link bushingsMaximum smallest sprocket: 42TMinimum smallest sprocket: 40T Sunken type pulley bolt Pulley teeth: 11TRear speeds 11Top-Normal Spring Type SHIMANO SHADOW RD+Maximum biggest sprocket: 11TMinimum biggest sprocket: 11TTotal capacity: 31T