Mismatched dual tires are wasteful and costly. Additional fuel expense and tire wear is the result of even a 1/8th inch tire circumference.

The logic: First, compute the circumference of the tire. This is the actual distance each tire must travel as a dual.

TIRE A: 480 rotations @ 10.996 ft. per rotation – 5280.0 FEET TIRE B: 480 rotations @ 11.028 ft. per rotation – 5295.7 FEET

Subtract the difference to see how many skid feet per mile is wasted. Measuring how mismatched diameters affect performance.

SKID FEET PER MILE – 15.7 FEET