the rubicon has great torque i dont know how well the trans will hold up to the tires a friend of mine has a ruby and has 25 big horns on it and those tires go any where even wiht him as the rider (no offencec but he rides like a bitch) the 450 has good torque too i only have 25s on mine now but plan to go up to 28s and from what i hear they can spin them no prob and dont usualy break hope i was of help to ya