How do I Choose the Right Tyre

Find out your vehicle’s tyre size

4w edito tip1 tiresidewall help and advice

Find your size on your tyre

  • Look at the sidewall of any one of your tyres and make note of the numbers and letters on it.
  • The information will allow you to research tyres that fit your car.

What do these letters and numbers mean? 

Tyre Width or Section Width - Width of the tyre (or thickness) in millimetres is measured from a tyre’s widest point of its outer sidewall to the widest point of its inner sidewall.

Aspect Ratio - Aspect ratio is the relationship between the tyre’s sidewall height and the tyre’s width. The lower the ratio, the smaller the sidewall height, which means better cornering, but a rougher ride.

Construction - This indicates the tyre’s internal construction. They can be “Radial” like most tyres, or D, for “Diagonal construction” or B, for “Belted”.*

Wheel Diameter- The number is in inches and indicates the diameter of the wheel on which the tyre is designed to fit.


Load Index


This indicates how much weight the tyre is certified to carry at maximum safe inflation. Numbers refer to a chart that specifies the load capacity that the tyre can carry. For example 97 = 1,609 pounds

4w sku loadindexchart help and advice

4w sku svg help and advice

Speed Rating chart


This indicates the maximum safe speed at which a tyre is certified to carry a load under specified conditions. Speed ratings range from A (lowest) to Y (highest), with one exception: H falls between U and V. To find the maximum speed for your tyre, refer to the speed rating chart. Exceeding the lawful speed limit is neither recommended nor endorsed.

Find your tyre size in your vehicle owner’s manual or on your car door

  • Find the information in your vehicle owner’s manual in the glove compartment or on the tyre information sticker on your driver’s side door.
  • Usually those elements contain all the information relating to your tyre size and specifications, as well as the appropriate tyre pressure.

See the “Find your tyre size on your tyre” tab for a full description of the numbers and letters.

4w edito tip2 tireandloadinginformation help and advice

4w edito tip whatareoetires help and advice

What are OE tyres?

OE stands for “Original Equipment”, meaning that the tyres were approved by your vehicle manufacturer to come standard on your vehicle.

Some vehicle manufacturers, such as Audi, BMW, Mercedes and others, equip their vehicles with tyres that are specifically made for their brand. These tyres have a special OE marking on the sidewall. In this case, Michelin recommends replacing the tyres on your vehicle only with tyres equipped with necessary OE marking.

Table of OE markings by vehicle brand:

 * = BMW, Mini
MO = Mercedes
AO = Audi
VO = Volkswagen
N0, N1, N2, N3, N4 = Porsche

You are using a web browser not supported
You are using a website browser that is not supported by this website. This means that some functionality may not work as intented. This may result in strange behaviors when browsing round. Use or updgrade/install one of the following browsers to take full advantage of this website