High-strength 15T pinion gear (initial gear) made out of tough 7075 T6 aluminum and especially 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 doing work for vibration-free procedure. Fine inside threading allows effortless installation on XCA clutchbells (standard or lightweight variations). Each pinion is finely etched using the enamel volume for easy & fast recognition. Available in popular gearing sizes, allowing you to have the best gear ratio for virtually any track.