The crank arms have been carefully engineered using ultra-high strength 7050 aluminium alloy to maximize strength to weight ratio & are fully forged for maximum fatigue resistance & then extensively CNC machined for that classic Race Face look. The Race Face Turbine chainrings are 100% CNC machined from super-hard 7075 aluminium to maximize wear resistance & impact strength. The chainset also features the EXI interface external bottom bracket system for easier crank installation & removal with standard tools & fully adjustable chainline. New light weight Turbine bottom bracket with titanium coated bearing races to keep water out & and set a new standard in durability.