The Shimano Deore XT M770 9 Speed Rapidfire Shifter. 9-speed shifters with 2-Way release to exceed the demands of ever changing bicycle designs & riding styles. 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 the upper release lever to perform up to two shifts in one sweep. Multi-bearing design uses two ball bearing units to provide a low-friction & reliable shifting action. One piece lower alloy thumb release lever increases durability & gives sharp precise shifts. For use with 9-speed drivetrain. Removable optical gear display allows the use of these shifters with any brake lever. Raised optical gear display instantly shows you what gear you're in & allows clearance for suspension lock out clamps below. Multi-position adjustable handlebar clamp for custom lever positioning.