Tough, aggressive and light weight 12-speed SLX Rapidfire I-Spec EV shift levers with Vivid indexing and 2-way release function. Shimano SLX M7000 - STI Gear Lever - 11 Speed - Right - I-Spec II. Light to the touch but positive and crisp, Vivid indexing provides a constant amount of shift lever force across all 12 sprockets.