I have recently slipped in the 2 3s lipos and upgraded the gearing to 24pinion and 54 spur. I hit a speed of 57.2mph stil pretty fast but i know the truck can do more. I have the stock tires and i was wondering what is the best speed rim and tire combo so the tires dont blow up so much when going almost 60. Also I got my 24t pinion from robinson racing and it doesn't seem to want to sit on the engine shaft, even when the srew is tight with lock tight it will find away to slide on the shaft, why?