How is tyre measured




















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All Promotions. Check out our great range of current promotions. Interest Free Finance. AA Smartfuel. Finance Now. Get the power with our tyre tips. Tyres come in a variety of sizes and designs, and most cars are compatible with more than one size option. This can make choosing the right tyre for your car quite confusing at times. This manual should have all the specifications you require to make an informed tyre decision.

Tyre size information can also be found on the tyre placard, often inside the drivers door jamb. The tyre placard will often state tyre size, as well as recommended tyre pressures. Alternatively, tyres have a code system moulded into their sidewall. This allows you to understand their technical capabilities, so you drive appropriately depending on the type of tyre you currently have.

It will also help you better determine what tyre you need to replace it with should it be time to switch. The sidewall code provides information on tyre size and construction e. Inch measurement tyres are fairly easy to understand however metric tyres use a more difficult system to read. The first number on a metric tyre is the width. Divide this by The third number generally preceded by an "R" is the wheel diameter. The sidewall and aspect ratio are used in metric sized tyres to determine the overall height of a tyre.

The second number on a metric tyre is to calculate the side wall measurement. The sidewall height is a percentage of the width of the tyre. This second number is that percent. Our tyre calculator makes this happen for you. Just type in the metric fields and click convert to inches. It also solves the problem of deciding what tyre you would like to run if you have inch measurements in mind but can't find a company that manufactures that inch size tyre.

Just fill in the inch measurements you are looking for and it will calculate and exact metric version of that tyre.



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