This Losi Mod 1 Plastic Spur Gear is intended for use with the Losi 8IGHT-E series vehicles. These spur gears are made of highly durable plastic that has been specifically designed for the rigors of 1/8-scale electric buggy and truggy racing. Plastic Spur Gears help to make the car quieter, but require a more precise mesh setting. Spur gear includes a steel insert for improved overall strength and longevity, and the steel insert stays on the center differential when the spur gear is removed, allowing you to change your spur gear quickly and easily.