For hard-core 'wheeling, slower speeds mean greater control and less strain on your drivetrain. However, hard-core 'wheeling also means big tires, which can drain your horsepower and drop your torque ...

I once drove a K5 Blazer from the bottom of the country to Idaho and back. I did so with 39-inch tires, a 500hp big-block, three transmission speeds, no climate control, no top, earplugs, and a very ...