You should rotate your vehicle's tires to...?

Technically, it does both, but the main reason is ''a'' If you have a front-wheel-car for instance, you're going to have more vehicle weight on the front of the car, because you have the engine, trans, driveline all in the front. And since the drive wheels take more abuse anyway, all-the-more w/ a front driven vehicle. After it wears a fair amount, you'll notice the front tires are fairly worn and the rear ones are look almost new still. So yes, you're equalizing wear pretty much. : )