I'm super slow building a 88 Suburban. I just picked up a set of 17" for it. Mainly because a bunch of heavy duty trucks run the 265/70R17 tires. It gives a tire height of 31 to 32 inches when installed. Perfect for my 3.73 gears. I can find take off tires fairly cheap, and new ones are easy to find. As they stated, a little more room for the ball joint flip, and future larger brakes. I'm doing it mostly for the size and availability of the tires. Another advantage is it lowers sideway flex, makes you truck drive and track better. Without being so stiff that it rides like crap.