SRAM MRX Comp Grip Shifter Get a Grip Whether your ride of choice includes gently rolling terrain or fast downhill descents, the MRX will follow you there with a crisp, positive response on your shifts. The SRAM MRX Comp is a grip twist shifter that is compatible with Shimano rear derailleurs. It features a 1:2 cable pull ratio and comes with a 1900mm cable and a 2012mm cable. The shifters also include handlebar clamps. Features Compatible with Shimano rear derailleurs Shifter Front Derailleur Compatibility: Mountain Triple(friction or index)Weight(claimed): 51 g Drivetrain Spacing: 6, 7 or 8-Speed | Sram | Mrx Comp Grip Shifter 6 Speed, Rear, Shimano Mtn