the Turbine crank continues Race Face's legendary tradition for excellence in aluminum cranks. Featuring our signature I Beam arm profiling our smooth shifting, made in Canada Turbine rings. Designed specifically for performance XC and AM riding, Turbine is the benchmark for aluminum cranks. Arms are carefully engineered using ultra high strength 7050 aluminum alloy to maximize strength to weight ratio. Fully forged for maximum fatigue resistance and then extensively CNC machined for that classic Race Face look. Aggressive I Beam profiling minimizes weight while maintaining stiffness and strength. Race Face Turbine chainrings are 100% CNC machined from super hard 7075 aluminum to maximize wear resistance impact strength. Featuring our 'EXI' interface external bottom bracket system for easier crank installation and removal with standard tools and fully adjustable chainline. Integrated butted, forged and CNC machined CrMo EXI spindle. Incorporated crank bolt puller cap makes crank removal a snap with just an 8mm hex wrench. Removable granny spider ensures no interferance with chain guide setups. Comes with our all new Turbine BB Bearings feature our new custom triple wiper seal to better retain grease keep contaminants out. Custom 6805 16 ball retainer bearings with Titanium coated races that ensure unparalleled corrosion resistance. Also available with BB92 press fit or BB30 conversion bottom bracket assembly.