AP-09 I Suitable for all positions of light and medium trucks and buses running on highway and high-grade roads. Size Load Index & Speed Symbols PR Load Range Standard Rim Max load and Max Air Overall Diameter (in) Section Width (in) Revolutions per mile Tread Depth 32nd Dual Single psi lbs psi lbs 11R22.5 146/143K 16 H 8.25 6005 120 6610 120 41.5 10.98 501 24 10.00R20 146/143K 16 H 7.5 6005 120 6610 120 41.5 10.94 501 20 10.00R20 149/146K 18 J 7.5 6610 135 7160 135 41.5 10.94 501 20