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The sidewalls of your vehicle’s tyres contain essential information regarding the tyre size. Noting these numbers becomes exceptionally crucial when you purchase a new set of tyres.
Among these numbers is the tyre aspect ratio, depicted by a percentage. It indicates the total height of a tyre.
The following sections detail tyre aspect ratios, their calculation, and much more.
The height of the tyre from the bead to the tread expressed as a percentage is referred to as the aspect ratio of a tyre. For instance, if the aspect ratio is 45, the height of the sidewall of a tyre is equal to 45% of its width.
The tyre aspect ratio has much to do with any vehicle’s overall driving efficiency. Take a look at the pointers below to understand how:
Calculating the tyre aspect ratio is simple. The aspect ratio is typically depicted after the section width in the tyre’s sidewall. It is usually a two-digit number. For instance, if the number is 65, it would indicate that the height of your car’s tyre equals 65% of its width.
Thus, you can calculate the aspect ratio of a tyre through this formula:
Aspect Ratio (%) = H (Section Height of Tyre) / W (Section Width of Tyre) X 100
Apart from the aspect ratio, the tyre size code also provides other vital details.
Let’s understand with an example. Suppose the sidewall of your car tyre has the following numbers - 205 / 60 R16 92 H, it would mean:
Thus, it is highly crucial that you purchase a tyre with the needed tyre aspect ratio. Consider noting these numbers and talk to the servicemen when you are buying a new set of tyres for an informed decision. It will have a significant impact on your driving comfort and safety.
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The tyre aspect ratio is crucial because it helps in providing optimal ride comfort and vehicle handling.
You can find your car tyre’s aspect ratio on the tyre's sidewall. It is also mentioned in your car manual and usually on the sticker near the driver’s door.