Review (1/5): POS!!!
I bought this thinking how bad could it really be but as soon as I got them out of the package, I realized what I had bought a POS. This is just a nylon gear with no glassfiber reinforcement. I figured what the heck I'll run them anyways. I have a 26cc engine with a 10,000 RPM clutch. I got approximately four minutes of run time before they melted down, so in short save your money and get a genuine King motor, Roven or HPI spur gear.