Tyre measurements

What is the size of a tyre? How do you read tyre size? Let’s take the tyre above as an example. Therefore, this radial tyre has a width of 205mm.

This refers to the tyre being a radial type- this is like the majority of the tyres used today. Just fill in the inch measurements you are looking for and it will calculate and exact metric version of that tyre.

There are many more possibilities and choices in metric tyres so the use of a tyre size calculator can come in handy. Then as a bonus it shows examples of your speedometer reading with the first tyre, and the actual speed. Typically, the higher the number, the more grip you get. By that, we mean the height of the sidewall expressed as a percentage of the width.

Tyre Sizes Explained. Width: This is the overall width of the tyre, represented by the first digits on the sidewall of the tyre.

Wider tyres offer better grip, but can create excessive amounts of road noise. The profile of the tyre. Essentially this is the height of the tyre as a percentage of the width.

So, in the above example, a tyre that has an aspect ratio of would have a height equal to per cent of its width. Whether you are using tyre metrics, vehicle specification, or tyre size by registration number, with our tyre finder you are always a few clicks away from a wide selection of tyres from leading brands. It might be supposed that these two tyres are both notionally 26” diameter and one and a half inches in width, but 26×1½ is a whole inch bigger than 26×1.

Look at our free to use tyre size calculator, used to compare the differences between you OE fit tyres and other alternatives. As a rule, please only allow yourself a maximum of 2. This is a graphical representation of how your chosen change in wheel and tyre will affect your stance, poke and clearance. In the example above, the tyre is 195mm wide.

A tyre is sized by its inside diameter. It gives the width of the tyre against its height as a percentage. This is all the information you need to order your tyres if you would like to know more read on Aspect Ratio. A series tyre, therefore, is a tyre whose.

All tyres carry a speed symbol in the form of a letter indicating. Once you have found your car’s tyre size, first click on the right wheel diameter indicated in inches, and find all the available Michelin tyres for your need. If you prefer, you can also find your tyre by selecting your car type or usage, or by selecting your car brand.

We recommend that you use the traditional sizing method wherever possible as most tyres that we stock use this system. This displays the width of the tyre in millimetres. Select your tyre size and find the right car tyre for you. With a standard tyre, the sidewall height is usually 82% of the nominal section width.

Can I use a different tyre size? If only it were that simple! It’s the total width of the tyre in millimetres. As explained above, it’s the ratio of section height to the section width.

If you do not have access to your car, you can use our online configurator to get a list of tyre sizes which are compatible with your car. Wheel Size App for iOS.

Normally a number of different tyre section widths are permissible on a given wheel rim width but one or two will be recommended as optimum.