I didn't realized it was that strong using 12s. Couple days ago, I used the same batteries but wired each pair in parallel then wired those in a series to make 6s. The front never came off the ground. I tried using 9s when everyone left and my friend came by with tire glue. I was able to stab the throttle and the front picked up from a dead stop and then went down and it pulled pretty hard all the way. I don't think the motor was meant to be used with less than 8s.I just saw the video Sleebus posted. I wish he recorded my truck doing a back flip. I was shocked it even did that. The batteries I used were rated at 30amps btw.