11 speed 105 wide link rear derailleur medium cage gsadvanced wide link design increases rigidity and shifting performancesuper stiff for fast and accurate changes across the cassettelarge 11 tooth pulleys increase service life and reduce noisesuper light shift actioncompatible with 11 speed drivetrainsmaximum low sprocket 32t with double chainsetmaximum front difference 22t total capacity 40taverage weight 232 grams