i have the same truck, and i have the two speed *winks at novicerob* and no matter what you wont get wheelies with the stock tires, or mashers (unless you mean masher 2000's) i know because i got mashers, and when i once i saw that they were half worn from a day of bashing, i new they woulndt work either, so i got some masher 2000, they were the first set of decent tires I've had on my truck. and i get wheelies, with the batteries in back, even though i have the stock engine still. i dotn know why i said all that for a simple point, but why not.