High-strength 15T pinion gear (initial gear) produced from tough 7075 T6 aluminum and specifically hardcoated for superior energy, light-weight, and high durability. Produced on an authentic gear unit, all pinions work ultra-precise enamel shaping and ultra-true working for vibration-free procedure. Fine inside threading allows effortless installation on XCA clutchbells (standard or lightweight variations). Each pinion is finely etched utilizing the enamel volume for easy & fast recognition. Accessible in popular gearing sizes, helping you to have the right gear ratio for almost any track.