Shifting performance is important when you're riding in demanding terrain. Being able to go from a high gear to a low gear quickly will save your legs on those tough climbs. The Shimano Deore SL-M5100 11-Speed Shifter is designed for aggressive mountain biking and 11-speed drivetrains. It features Rapidfire Plus shifting and has a 2-way release. It is available in both I-Spec EV or band clamp options.