I have been seeking the same answer to the question. Is the truck going to be used for racing or bashing? There have been test done and all the makers that make high rpm motors are sensorless. But when you race it's not all about speed , it's turning and jumping...control! The sensored motor won't glitch at very low speed, and if it's geared for Max potential. If you run like most it's probable on/ off full throttle