[suicideneil]

Easy, the trucks are over powered! The fact is in a racing situation full throttle is rarely ever used for more than a few seconds, so the wheelying problem doesnt manifest itself very often. The torque/ gearing issues arent easily addressed with the current BL line of motors available- go too small and they over heat trying to propel the truck, go XL and they have too much torque almost. Gearing up for more speed/less torque is a no-no, since overgearing is what kills the motor/speedo/batteries, believe me. When you see the vids on youtube of trucks wheelying down the street etc its mainly 'showing off', demonstrating the power of the setup; you would never see that happening in a race. As for batteries, they can never be overpowered as such. The more MAh capacidt the better, and voltage ratings is just a case of matching the volts required by the motor- you cant have too many volts since the esc/motor wont take it & will blow up. If you want a fast but controllable system for you & your son, I would suggest the HvMaxx 6.5. It is a very sturdy system, very simple to set up and is 99% bullet proof- you rarely hear about blown escs/motors, and when you do its usually bad from the get-go, not as a result of just using it normally. I love my HvMaxx, and although it lacks torque (which make it wheely), it is still fast and with the correct gearing of about 25-30:1 it easily does 35mph+ with 12 cells in a 12lb truck. None too shabby I would say....