Shimano GRX812 GS Rear Mech 1x11

Shimano GRX 812 Rear Derailleur - 11 Speed - Medium Cage GS

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.

• Adjustable chain stabilizer prevents chain slapping and drops
• Switch stabilizer ON/OFF to match the terrain
• Gravel-tuned clutch tension
• Compatible with current road Dual levers
• Top sprocket: Max. 11T/Min. 11T
• Low sprocket: Max. 42T/Min. 40T
• Total capacity: 31T
• Designed for a 1 x 11 speed chainset up to 42T a cassette
• Smooth and reliable mixed surface shifting