AP-100X Recommended for low platform trailer applications. Construction optimized for long service life. Size Load Index & Speed Symbols PR Load Range Rim Max load and Max Air (lbs&psi) Overall Diameter (in) Section Width (in) Tread Depth (32nds) Dual Single lbs psi lbs psi 215/75R17.5 135/133J 16 H 6.00 4540 123 4805 123 30.2 8.31 18.3 235/75R17.5 143/141J 18 J 6.75 5675 127 6005 127 31.38 9.17 18.3 245/70R17.5 143/141J 18 J 7.50 5675 127 6005 127 31.06 9.76 18.3