Shimano GRX 1X11 Rear Derailleur Brakes Rim For downhill mode the front

For downhill mode the front jaw section is clicked back onto the base plate being quadruple secured by the Auto Quad Lock technology

SIZE OPTIONS : 34 - 41 (half sizes)

- Fill weight: 34 oz

Weight:413

Shimano GRX 1X11 Rear Derailleur Brakes Rim For downhill mode the frontSHIMANO GRX REAR DERAILLEUR RD RX812 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 an ON OFF switch for the chain tensioner. The RD RX812 rear derailleur is compatible with MTB cassettes with a 42T low sprocket max. FEATURES: For 1x drivetrains Adjustable chain stabilizer prevents chain