Bicycle tires are not like car tires. Car tires can get 25,000 to 75,000 mile per tread sets. The tread can be deeper then on a bike. And the tire thicknest can be a lot thicker. A car engine does not care how much the tires weight. So they last a lot longer then a bicycle tire. On a Bike you want a light tire with little tread that will grip the road. The car tires are made harder then a bike tire so they wear down slower. So the bicycle tire wear down faster then a car tire.