I guess its cause the front wheels won`t stay on the ground ! [8D]

http://youtu.be/d0WTdd_2rjw

Its a Hyper 9e running MM & 6s, it was always balooning front wheels with std wieght in the centre so i went with 10K.

....then it just wheelied everywhere, so I progressively uped the pinion tring to take some of the torque away and that just made it insanly fast and ballon all 4 tyres...and throw them of the rims...and wheelie even easier & harder !

Can`t keep the tyres on the rims, even with the most careful glueing(with the best ca) it throws 1 or 2 off every set of batts.

So it seems gearing up won`t solve the overpower wheels up handleing of 6s...just makes it worse !

either get a smaller electric motor or try taking all the clips out of the sispension so its sagging a bit for more presure on the wheels to stay on the ground maybe adjust the rear wing  add some weight to it im not sure im a nitro rc guy

You could also try puttin 3s battery pack in it, or using slicks on the sand or not give it so much throttle or putting extra waight on the front end(maybe a KG or 2). I dunno, I'm also a nitro guy.

Bigger wheels.

Softer springs on front and rear shocks.