Rim Size Ply Rating Load Index Speed Symbols Standard Rim Standard Load (kg) Standard Load (lbs) 13 ST175/80R13 6PR 91/87 M 5J D545 S615 D1200 S1360 14 ST205/75R14 6PR 100/96 M 5 1/2J D710 S800 D1570 S1760 ST205/75R14 8PR 105/101 M 5 1/2J D825 S925 D1820 S2040 ST215/75R14 6PR 102/98 M 6J D750 S850 D1650 S1870 15 ST205/75R15 8PR 107/102 M 5 1/2J D850 S975 D1870 S2150 ST205/75R15 6PR 101/97 M 5 1/2J D730 S825 D1610 S1820 ST225/75R15 8PR 113/108 M 6J D1000 S1150 D2200 S2540 ST225/75R15 10PR 117/112 M 6J D1120 S1285 D2470 S2830 16 ST235/80R16 10PR 123/119 M 6 1/2J D1360 S1550 D3000 S3420 ST235/85R16 10PR 125/121 M 6 1/2J D1450 S1650 D3200 S3640