How to read my car tyre size?
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Tyre Width
145 indicates the section width of a tyre in millimetres.
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Aspect Ratio Or Profile
80 indicates Aspect Ratio of tyre. This number indicates sidewall height of the tyre as a percentage of tyre width. Here, sidewall height of the tyre is 80% of the width.
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Tyre Construction
R indicates that the tyre has radial ply construction. Almost all car tyres come with radial ply construction.
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Rim
12 indicates the Diameter of the wheel rim in inches.
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Load Index
74 indicates Maximum Load Capacity of the tyre. Please refer to the Load Index table.
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Speed Symbol
T is the Speed Symbol and it indicates at the maximum speed for the tyre at full load. Please refer to the Speed Symbol table.
Tyre Load Index Ratings
| Index | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| kg | 265 | 272 | 280 | 290 | 300 | 307 | 315 | 325 | 335 | 345 | 355 | 365 | 387 | 400 | 412 | 425 |
| Index | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| kg | 437 | 450 | 462 | 475 | 487 | 500 | 515 | 530 | 545 | 560 | 580 | 600 | 615 | 630 | 650 | 670 |
| Index | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| kg | 690 | 730 | 750 | 775 | 800 | 825 | 850 | 875 | 900 | 925 | 950 | 975 | 1000 | 1030 | 1060 |
| Index | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| kg | 1090 | 1120 | 1150 | 1180 | 1215 | 1250 | 1285 | 1360 | 1400 | 1450 | 1500 | 1550 | 1600 | 1650 | 1700 |
Tyre Speed Symbol Ratings
| Speed symbol | N | P | Q | R | S | T | U | H | V | Z | W | Y |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| miles/h | 87 | 93 | 99 | 106 | 112 | 118 | 124 | 130 | 149 | 150+ | 168 | 186 |
| km/h | 140 | 150 | 160 | 170 | 180 | 190 | 200 | 210 | 240 | 240+ | 270 | 300 |
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