I'm new to the RC world and just bought a GP today. Took it out of the box looked it over and everything seemed ok. Put on the wheels and took it out for a test run. Not long into the test run the left tire falls of. Thinking I might not have put it on tight enough but that;s not the case only the front left tire comes loose. Not even an hour into it and the gears start stripping and it's already on the shelf until I replace the cheap plastic one with metal or aluminum. Should my gears strip so easily?? Can someone recommend where to get an upgraded 81T spur gear?

Thanks!