And just as a coarser sandpaper removes material faster, a coarser road textures cause more tire wear. The following mileage estimate is typical of what a 40000 mile rated tire driven on smother asphalt would deliver if driven exclusively on other road surfaces. Smooth Asphalt . Coarse Asphalt . Extra Coarse Asphalt .
Wheel alignment controls the distribution of vehicle load across the tire's footprint.
Caster is the angle of steering axis tilt when viewed from the side and while it does not affect wear, it does affect the vehicle's handling and tendency to track straight down the road. Toe is the direction that the tires are aimed when viewed from above. The complex trigonometry of proper tire balancing. Click to enlarge. These figures will change depending on the number of ounces of weight a tire is out of balance and the diameter of the tire in relation to the diameter of the rim it is mounted on.