ULTIMATE USE Race StemULTIMATE USE's Race Stem is crafted from aerospace-grade 7075 aluminium and is CNC machined to reduce weight and make sure it is strong, rigid and lightweight. It has gone through rigorous FEA testing to ensure it is race ready and can handle the stresses of the most powerful sprinters and late breaking on the steepest descents. Carbon and aluminium handlebar friendly, it uses the common 31.8mm clamp standard.Features: Material: Aerospace-grade 7075 Aluminium Bar Clamp Size: 31.8mm CNC Machined FEA testedBuy ULTIMATE USE Components from Chain Reaction Cycles, the World's Largest Online Bike Store.