MFL wrote:
^ I don't have a real answer to your question Spoon, but smaller tires/wheels help keep a vehicle that is mostly used for hauling a load on rear axle, lower to the ground.
Jerry
And duallies have significantly shorter tires than comparable newer srw trucks, where greater rim size would eat into the preferred sidewall height, IMO.
Smaller diameter apples to apples also = more power to the ground.
Also not official answers, but viable.
And one of the downfalls of a dually as well, when it comes to front tires. Skinny pizza cutters that are running far closer to their rated capacity than comparable weight srw trucks = recipe for increased treadwear.