Shimano GRX RD-RX822 Deragliatore posteriore SGS a 12 velocità

Better chain protection and quieter shifting in gravel use.

With its integrated chain stabiliser, the SHIMANO GRX rear derailleur ensures quieter shifting and safer chain management in rough terrain. The RD-RX822-SGS is compatible with SHIMANO 12-speed MTB cassettes 10-51Z, so you'll never run out of gears even on the steepest forest highway and the steepest single-trail climb in the high mountains. The chain tensioner has an ON/OFF switch that facilitates wheel removal.