Sram x01 type 2 11 speed rear mechthanks to its horizontal parallelogram design x horizon can keep the chain gap the same across all 11 gears by taking vertical movement out of the equation this design doesnt just make shifting fasterit reduces shift force and eliminates ghost shifting roller bearing clutch technology reduces bounce and chain slap cage lock technology makes wheel removal and installation easier than ever before paired with the x01 shifter the x horizon rd forms the bac