Shimano Deore M4100 10 Speed Gear Shifter With Inner Gear CableShimano Deore M6100 Right Hand Shifter Deore M6100 mountain bike Rapidfire shifter pod featuring 2 way release for cost effective Dyna Sys 12 speed shifting performance. Light to the touch but positive and crisp, Vivid indexing provides a constant amount of shift lever force across all 12 sprockets. 2 way release allows shifting from various riding positions; the upper lever still performs the same shift function, but it can now swing in either