SHIMANO GRX - Rear Derailleur - SHIMANO SHADOW RD - 42T max low sprocket - 11-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.

Features

• Silent and uninterrupted rear shifting on rough terrain
• Adjustable chain stabilizer prevents chain slapping and drops
• Smooth and reliable mixed surface shifting
• Switch stabilizer ON/OFF to match the terrain
• Compatible with current road DUAL CONTROL LEVER

Specifications

• Groupset Series- Shimano GRX RX812
• Speed- 11 Speed
• Pulley- 11T
• Low Sprocket(Max)- 42T
• Low Sprocket(Min)- 40T
• Top Sprocket(Max)- 11T
• Top Sprocket(Min)- 11T