FEATURES of the ShimanoXTSL-M8100-IL Right I-SpecEV 12-Speed Shifter Light ...FEATURES of the Shimano XT SL-M8100-IL Right I-Spec EV 12-Speed Shifter Light and responsive front shifting improves efficiency control and concentration Shift both up and down with a single lever RAPIDFIRE PLUS MONO Instantaneous push and pull...more