Pro-X 07.FS12007-14 Grooved Ultralight Front Sprocket - 14T Manufactured from low corrosion SCM435 Ni-Chrome Molybdenum steel Low carbon core to prevent breaking and case hardened surface for maximum wear resistance Precision CNC machined for perfect fit and lightweight design for ulitimate performance Self cleaning dirt grooves to extend chain and sprocket life to the max Offering the perfect balance between strength, performance and longevity