The pro lt alloy reversible 6 degree stem a 6061 series aluminium reversible road or off road ahead stem with 318 mm diameter bar clamp pro lt alloy reversible 6 degree stem features 6061 series aluminium reversible road or off road ahead stem with 318 mm diameter bar clamp made from 3d forged 6061 aluminium for high strength and excellent resistance to corrosion reversible design with 6 degree rise for 1 18 inch steerers four bolt removable face plate for easy b