Rox Speed FX Elite Height-Adjustable Snowmobile Handlebar Riser - Clear Anodized - 4-6in. 1R-HA46SEAllow you to adjust your handlebar height easily on the trail, or in the back country, to increase your comfort by customizing your sled and its feel to you Allow you to clamp a stock 7 8in. diameter handlebar, or you can remove the 7 8in. reducers and then clamp a 11 8in. oversize aluminum bar reducers lock into risers to assure no slippage between components and serrated teeth ensure maximum gripping power on the handlebar Risers take the guess work