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 specify the load capacity that the tyre can carry. For example 97 = 1,609 pounds.
Load index chart
