Amen, it's the distribution of the weight. Also, if there is less weight, one can use an narrower tire to provide the same amount of pressure per square inch of

Amen, it's the distribution of the weight. Also, if there is less weight, one can use an narrower tire to provide the same amount of pressure per square inch of contact patch. In other words, less weight + smaller tire == same snow bite. Smaller tire? Cheaper tire. Smaller tire? Less rolling resistance. Lighter spare tire. Lighter truck? Better gas mileage, better stopping, better cornering. If there is a 1000 lbs less to stop on the snow, that will make a huge difference.