Race Face Turbine Chainset The Race Face Turbine series is designed to be light enough for XC use yet strong enough for AM use. Using the finest top quality 7075 alloy & continuing this trend into the Turbine cranks, you can be sure you are getting a thoroughbred product. The arms are carefully engineered using ultra-high strength 7075 aluminium alloy to maximise strength to weight ratio. Fully forged for maximum fatigue resistance & then extensively CNC machined for that classic Race Face look. Aggressive I-Beam profiling minimises weight while maintaining stiffness & strength. Race Face Turbine chainrings are 100% CNC machined from super-hard 7075 aluminum to maximise wear resistance & impact strength. Bottom Bracket NOT included.