Low pressure: wears out the two outsides edges
Not always true with modern tires. Some tires for offroad have such stiff sidewalls that you might get the opposite effect. Other off road tires are so stiff that they will establish odd wear patterns if driven mostly on the street. But you can't be fashion correct unless you have a set of big mud tires that are so big that any one tire might support you whole truck or suv buy itself. Oh, and don't forget the three shocks per wheel, too. You know the ones that have so much extra capacity that they never get warm enough to move much and it blurrs your vision while you drive. Being pretty is sometimes painful.