Ehh you can't really just put harder tires on a car and leave it at that. Harder tires means less grip, and that is a serious setback and much less safe in a ca

Ehh you can't really just put harder tires on a car and leave it at that. Harder tires means less grip, and that is a serious setback and much less safe in a car than the typical bus that runs city routes at lower speeds and less adverse road conditions. Tire temperature also will play a big roll in tire wear, and I wouldn't expect bus tires to get very hot only rolling half the time and at a lower speed than the typical car. And of course you also gotta factor in passenger count. Buses generally have more than just 1 or 2 people, while the vast majority of cars will have 1 or 2 people most of the time. And even if a bus tires were to wear out twice as fast as a car's tire, that is still less wear per person than a car.