Tire parameters
Width
The distance in mm between the sidewalls of the tire in its widest parts at rest.
Height
The distance in mm between the inner rim and the corresponding top of tread at rest.
Inner diameter
The diameter of the inner rim measured in inches.
Aspect ratio
A parameter calculated using the formula::
(Height/Width) x 100
При липса на стойност за пропорционалното отношение се приема
пропорционално отношение
82.
Например: 155 R 13 = 155 / 82 R 13
Standard ways of writing tire sizes
Passenger car tires 165 / 70 R 13 55 H
| 165 | Width (mm) |
| 70 | Aspect ratio |
| R | Radial |
| 13 | Inner diameter(in inches) |
| 55 | Load index |
| H | Speed index |
Light-truck tires 185 / 65 / R 16 106 / 104 L LT
| 185 | Width (mm) |
| 65 | Aspect ratio |
| R | Radial |
| 16 | Inner diameter(in inches) |
| 106 | Load index (single axle) |
| 106 | Load index (dual axle) |
| L | Speed index |
| LT | Symbol for light-truck use. |
Standard ways of writing motorcycle tire sizes
5.00 H 16 4 PR
| 5.00 | Width (inch) |
| H | Speed index |
| 16 | Overall diam. (inch) |
| 4 PR | Numbler of plates |
130 / 90 - 16 67 H
| 130 | Width (mm) |
| 90 | Aspect ratio |
| 16 | Overall diam. (inch) |
| 67 | Load index |
| H | Speed index |
M T 90 - 16 Load Range B
| M | Use (for motorcycle) |
| T | Width code |
| 90 | Aspect ration |
| 16 | Overall diam. (inch) |
Load
Range B | Load index |
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