This Kyosho factory replacement pinion gear set includes four pinions in 6-tooth, 7-tooth, 8-tooth, and 9-tooth configurations, giving you a range of gear ratios to tune motor performance to different track conditions or driving styles. Designed for Kyosho mini and micro class vehicles, the set lets you dial in acceleration and top speed without purchasing individual pinions separately. Features: Includes 6t, 7t, 8t, and 9t pinions in one set Four gear ratio options for flexible tuning Designed for Kyosho mini and micro platforms 7/7/26 cs