What does tyre size mean?

To the untrained eye, the side wall of a tyre can look like a meaningless set of numbers, letters and symbols. Hidden amongst these is the tyre size. But what does it look like and, more importantly, what does it mean?

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Where do I find the tyre speed rating?

The speed rating is displayed on the tyre’s sidewall, after the load rating. In this example, the car’s speed rating is W, which indicates that it has been legally approved for use up to 168 mph.

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What are run flat tyres?

If a tyre does let you down, your mobility is severely limited and a safe onward journey cannot be guaranteed. This is because there is a risk of the sidewall being pinched between the road and wheel rim as soon as a conventional tyre begins to lose air ...

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