Kimbrough 92 Tooth 64 Pitch Precision Gear

Kimbrough spur gears are molded using black 4/6 Nylon plastic, because black dissipates heat better then any other color. This plastic is almost three times tougher and will withstand operating temperatures 75° to 125° higher than plastics used by other R/C car gear manufacturers. 

These spur gears are full width, because a narrow or profiled plastic gear can deform under load, is weaker and less efficient. This can cause drag in the gear train and waste horsepower. The wider a gear is, the more load it can handle.