Find the Size on Your Tyre
A tyre's sidewall is simply the outer and inner "walls" on the sides of a tyre. Every sidewall has its own unique information that is divided into three main sections:
Type of vehicle for various tyre fittings:
P: Passenger metric
LCV: Light Commercial Vehicle
T: Temporary Spare
ST: Special Trailers
If your tyre has no letter, it signifies that your tyre is a euro “metric” size.
Tyre Width or Section Width
Width of the tyre (or thickness) in is measured in millimetres from a tyre’s widest point of its outer sidewall to the widest point of its inner sidewall. Why millimetres? It originated in Europe, which uses the metric system.
Aspect ratio is the relationship between the tyre’s sidewall height and the tyre’s width. In this example, the sidewall height of the tyre is 55% of its width. The lower the ratio, the smaller the sidewall height, which means better cornering, but rougher ride. Although not ideal for driving comfort, it does offer safe driving characteristics.
This indicates the tyre’s internal construction. They can be “Radial” like most tyres, or D, for “Diagonal construction” or B, for “Belted”.*
The number is represented in inches and indicates the diameter of the wheel on which the tyre is designed to fit.
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 = 730 kg. See the Load index 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.
DOT - Department Of Transportation Safety Code
This assures that our tyre complies with all Department of Transportation (DOT) safety standards. After the DOT insignia is your tyre's identification number, which begins with the tyre's manufacturer and plant code where the tyre was manufactured (two numbers or letters). The ninth and tenth characters tell the week the tyre was manufactured. The final number(s) signifies the year the tyre was manufactured.
Department of Transportation Safety Code.
Tyre's Manufacturer and plant code.
Denotes tyre size.
Optional characters that identify brand and other significant characteristics of the tyre.
Denotes week the tyre was produced.
Denotes year the tyre was manufactured.