Shimano Rear Derailleur, RD-RX815, GRX, 11-Speed, Shadow Plus Design, Direct Attachment(Direct Mount Compatible), 2×11

11-Speed

Gravel/Adventure specific rear derailleur with gravel-tuned clutch tension

Integrated chain stablizer mechanism

Quieter experience with shifting security and precision on mixed terrain

“On smooth surfaces, features an On/Off switch for the chain tensioner”