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Each tyre should have identification and max tyre pressures written on the side wall. This chart is for guidance only.

| Tyre Size | Diam mm | Width mm | Load Index | KG | PSI |
| 3.50-8 4pr | 383 | 90 | 46 | 374 | 36 |
| 4.00-8 6pr | 409 | 107 | 70 | 670 | 36 |
| 5.00-8 6pr | 468 | 144 | 76 | 800 | 71 |
| 5.00-10 6pr | 516 | 134 | 79 | 874 | 71 |
| 5.00-10 8pr | 516 | 134 | 84 | 900 | 65 |
| 5.20-10 4pr | 508 | 127 | 64 | 616 | 32 |
| 145R10 4pr | 492 | 147 | 68 | 630 | 35 |
| 145R10 8pr | 489 | 145 | 82 | 950 | 65 |
| 20.5x8-10 4pr | 516 | 198 | 76 | 800 | 35 |
| 20.5x8-10 8pr | 516 | 198 | 84 | 1000 | 50 |
| 195/55 R10 | 468 | 193 | 98 | 1500 | 76 |
| 145R12 | 542 | 147 | 72 | 710 | 32 |
| 155R12 | 550 | 157 | 76 | 800 | 32 |
| 145R13 | 566 | 147 | 74 | 750 | 32 |
| 155R13 | 578 | 157 | 78 | 850 | 32 |
| 165R13 | 596 | 167 | 82 | 950 | 33 |
| 175R13 | 608 | 178 | 86 | 1060 | 33 |
| 175R14 6pr | 634 | 178 | 96 | 1420 | 54 |
| 175R14 8pr | 634 | 178 | 99 | 1550 | 65 |
| 185R14 6pr | 650 | 188 | 99 | 1550 | 54 |
| 185R14 8pr | 650 | 188 | 102 | 1700 | 65 |
| 195R14 6pr | 666 | 198 | 102 | 1700 | 54 |
| 195R14 8pr | 666 | 198 | 106 | 1800 | 65 |