RockShox Reverb 1x Remote Upgrade Kit - Left Below MMX, A2-B1Upgrades your 1x bike to the familiar ergonomics of a left shift lever. A2 posts have a black return speed adjuster on the remote and no laser etched logos on stanchion by the saddle cradle B1 posts have a black return speed adjuster on the remote and "ROCKSHOX" laser etched logos on stanchion by the saddle cradle Includes 1x Remote Lever, MMX clamp, discrete clamp and bleed fitting Mimics the position of a left thumb shift lever Works with A2 and B1