How do I find my tyre size?

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Car-tyre-size-guide

How do I find my tyre size?

The easiest way to find your car tyre size is by entering your registration number at cartyres.com. On our homepage you will find an entry box where you can add your vehicle registration number and postcode and we will tell you the exact tyre size you need for your car. It is always very wise to check the tyre size on your existing tyres.

It's very easy to check what size tyre you need as the exact size is written on the sidewall of your current tyre.

The tyre size looks something like '225/40 R18 87W'.

And here's what those numbers and letters mean:

  1. 225 - Width of the tyre in millimetres

  2. 40 - Height of the tyre sidewall as a percentage of the width i.e. 40% of 225mm. This is also known as the aspect ratio.

  3. R - Radial construction.

  4. 18 - The diameter of the tyre's inner rim in inches. Or the size of your steel or alloy wheel.

  5. 87 - Load rating of the tyre

  6. W - Speed Rating, this indicates the maximum speed of the tyre when under full load

Front and rear tyres sometimes differ in size so it's vital that you check all tyres. By entering your car's registration number on cartyres.com you will be given the tyre size suitable for your vehicle - however whilst this is a helpful tool it's very important that you check the size on the tyres you currently have fitted to your vehicle to ensure you are ordering exactly what you need.