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Tyre Sizes

Where can I find my vehicle’s tyre size?

Regardless of which manufacturer made the tyre, its size is indicated on the tyre sidewall.

You’ll find the size information – a series of letters and numbers - printed or embossed over the surface of the sidewall.

How to read the tyre sizes

Let’s take the tyre above as an example. The tyre size is: 205/55 R16 91V.

The first number is the width of the tyre in millimetres. Therefore, this radial tyre has a width of 205mm.

The ‘55’ confirms the height shown as a percentage of the full tyre width.

The letter ‘R’ depicts the variety of tyre. This refers to the tyre being a radial type- this is like the majority of the tyres used today. Very occasionally, alternative letters are shown to indicate other types of tyres that are constructed differently, for example B (bias belt) and D (diagonal).

The number ‘16’ is the wheel rim diameter stated in inches. This tyre will fit over a rim that is 16 inches.

The ‘91’ indicates the load index.

The final letter ‘V’ corresponds to the tyre speed rating. In the example, the speed rating indicates a maximum speed of 118 miles per hour (190 kilometres per hour).