Shimano slx m670 10 speed rapidfire pod shifter features tough aggressive and light weight dyna sys 10 speed slx rapidfire shift levers with vivid indexing and 2 way release function light to the touch but positive and crisp vivid indexing provides a constant amount of shift lever force across all 10 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 direction allowing it to be