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-RX810 rear derailleur is compatible with road cassettes with a 34T low sprocket max. 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 Toggle clutch ON/OFF to match the terrain Switch stabilizer ON/OFF to match the terrain Gravel-tuned clutch tension Compatible with current road DUAL CONTROL LEVER Maximum front difference: 17T Top sprocket: Max. 11T/Min. 11T Low sprocket: Max. 34T/Min. 30T Total capacity: 40T Specifications: Series: SHIMANO GRX 11-speed Weight: 255 g B-Axle Hollow axle: Yes Cable adjuster: Yes Compatible chain: HG-EV 11-speed/HG-X11 Direct attachment (Conventional): Yes Fluoric coated link bushings: 4 Low sprocket_Max.: 34T Low sprocket_Min.: 30T Max. front difference: 17T Pulley_G pulley bearing: Yes Pulley_Sunken type pulley bolt: Yes Pulley_Teeth: 13T Pulley_T pulley bearing: Yes Rear speeds: 11 Top-Normal Spring Type: SHIMANO SHADOW RD+ Top sprocket_Max.: 11T Top sprocket_Min.: 11T Total capacity: 40T
