SRAM® MRX(tm) Comp Twist Shifter - Technology: 2:1 gear ratio & SRS technology for smooth and precise shifting - Gears: 5-speed - Gear Indicator: Quick View - Material: 50mm grip (extra soft) made from Empilon®, lightweight Grilon® housing with injection-molded finish - Compatibility: Shimano® derailleurs - Additional Features: sealed cable entry