High-strength 15T pinion gear (initial gear) made from tough 7075 T6 aluminum and specially hardcoated for superior power, light-weight, and high durability. Produced on an original gear unit, all pinions work ultra-precise enamel shaping and ultra-true operating for vibration-free operation. Fine interior threading permits effortless installation on XCA clutchbells (standard or lightweight variations). Each pinion is finely etched utilising the enamel quantity for easy & fast recognition. Accessible in popular gearing sizes, helping you to have the perfect gear ratio for any track.