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How can you work out the size of your tyres?

The tyres on your car are one of its most important features in terms of safety and performance; even with the modern technological advances like ABS and traction control, they would be useless without a quality tyre. Tyres are responsible for keeping your car steady on the road and they also help protect you in wet conditions, so it is important that you are well-informed on how they work and what size is best for you. Although the majority of people own a car, it is safe to say that not everyone fully understands how they work, but finding out the specifications can be relatively easy and could be very beneficial for you.

There are many ways to find out the size of your tyres, the easiest and quickest is to input your vehicle registration into the car reg search tool on the www.easywheels.co.uk website, you will then be shown the the recomended tyre sizes for your vehicle will be displayed, alternatively you can contact a local dealer, a manufacturer or just simply refer to your car manual. The best place to figure out their size is to check the tyres themselves – they are marked in accordance to the International Standards Organisation (ISO) to give you the simplest reading possible. On the side of the tyre there will be some numbers and letters and these correspond to the size of tyre you require when purchasing new tyres, the dimensions are composed of the following:

·         Tyre width: the width of the tyre is measured in millimetres and sizes range from 135 to 355 – this is represented by the first three numbers of the code on the side of the wheel and is usually followed by a dash.


·         Tyre profile: this is a percentage of the width of the tyre, so an example could be 45% of a tyre that’s width is 100mm.


·         Wheel size: this is the size of the wheel which the tyre fits on and is measured in inches and is usually preceded with the letter R.


·         Load index: this is the maximum load or weight a tyre can support and the higher the number the greater the load. Smaller cars will have a lighter Load Index than say a 4x4 which is heavier and requires stronger tyres to support its weight.


·         Speed index: corresponding to the tyres maximum speed. It is prohibited to fit tyres with a speed index below that recommended by the manufacturer of your vehicle.


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