SHIMANO Deore XT I-Spec Trigger Mountain Bike Shifter Set - SL-M780-I Precise and consistent shifting performance The new I-spec shifter set unifies the shifter and the brake band clamps - clean, uncluttered setup Instant-release, Multi-release & 2-way release options give you quick and versatile operation Compact & vivid Optical Gear Display 2x / 3x mode converter to match crank/derailleur configuration