This Traxxas 9776X Speed Transmission Gear in Blue with a Pinion Gear 11T is compatible with Traxxas cars, trucks, and motorcycles that use an electric fuel type and have a 1:18 scale. Its high-quality gear set is manufactured by Traxxas, a leading brand in the industry. It is a must-have for Traxxas enthusiasts who want to upgrade their vehicle's performance. This gear set is designed to improve the vehicle's speed and overall functionality. Get ready to experience a whole new level of excitement with this Traxxas 9776X Speed Transmission Gear.