The shimano sl m8000 11 speed rapidfire shifter a dyna sys11 11 speed shifter with vivid indexing and multi and 2 way release to exceed the demands of ever changing bicycle designs and riding styles light to the touch but positive and crisp vivid indexing provides a constant amount of shift lever force across all 11 sprockets shimano sl m8000 11 speed rapidfire shifter features 2 way release the upper lever still performs the same shift function but it can now swing in either d