Kimbrough is recognized as one of the best aftermarket gear producers in the R/C industry. Chuck Kimbrough Designed the tooling. With more than 30 years of plastic gear mold experience and more than fifteen years of experience racing R/C cars, Chuck knew what it took to make the best R/C car racing gears. Kimbrough only produces the best through proper design, engineering, implementation, and machining methods. You have raced the others, now race the best!