The pro lt alloy reversible stem a 6061 series aluminium reversible road ahead stem with 318mm diameter bar clamp pro lt alloy reversible stem features 6061 series aluminium reversible 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 6 degree rise for 1 18 inch steerers four bolt removable face plate for easy bar installation and even load distribution w