Upgrade your splitboard with the Voile Dual Height Heel Risers. The back climbing wire is the standard height of 55mm and the front wire is 75mm. The back climbing wire is the standard height of 55mm and the front wire is 75mm. The Voile Dual Height Heel Risers includes one pair of dual height climbing heels/wires and screws to mount to an inserted, factory-built splitboard.