TheShimano Deore XT M8100-IR I-Spec EV 12 Speed Right Hand Shift Leveris light to the touch but positive and crisp, vivid indexing provides a constant amount of shift lever force across all 12 sprockets. Shimano Deore XT M8100-IR I-Spec EV 12 Speed Right Hand Shift Lever Features 2-Way release: the upper lever still performs the same shift function, but it can now swing in either direction allowing it to be released by the thumb or index finger Multi Release allows multiple gear changes with one sweep, further adding to the speed of shift Multi-bearing design uses two ball bearing units to provide a low-friction and reliable shifting action One piece lower alloy thumb release lever with anti-slip increases durability and gives sharp precise shifts For use with 12-speed transmissions only Raised optical gear display instantly shows you what gear you're in and allows clearance for suspension lock out clamps below Multi-position adjustable handlebar clamp for custom lever positioning