Race Face Aeffect R 1x Seatpost Lever An Ergonomic Lever If you're looking for an ergonomic 1x dropper lever, you're in the right place. The Race Face Aeffect R 1x Seatpost Lever is compatible with the Aeffect R and Turbine R Dropper Posts. It is not compatible with the standard Aeffect. It uses a standard shifter cable and housing and the lever sits under the bar for a clean setup. Features Compatible with the Aeffect R and Turbine R Dropper Posts but not compatible with the standard Aeffect Uses a standard shifter cable and housing Lever sits under the bar for a clean setup | Race Face | Aeffect R 1X Seatpost Lever Black