HPI 86513 Light Weight Spur Gear 53T

These Light Weight Spur Gears are machined from hardened steel and have less rotational mass than the stock Spur Gear for increased power to weight ratio, thus quicker acceleration. Rotational mass is the number one issue to target when looking to extract all the power from your engine and having the option of one tooth up or down, these gears will help you fine tune the power at each track.