With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and secure, precise shifting on mixed terrain. For smooth surfaces, the derailleur has an ON/OFF switch for the chain tensioner. The RD-RX812 derailleur is compatible with road sprockets with a max. of 42D.
Features:
- Quiet, seamless shifting on rough terrain
- Adjustable chain stabilizer prevents chain slack and slippage
- SHIMANO SHADOW RD+
- Smooth and reliable shifting on mixed surfaces
- Change the ON/OFF position of the gimbal to suit the terrain
- Clutch tension tuned for gravel
- Compatible with existing DUAL CONTROL road lever
