What do tyre numbers mean?

Did you know, that the writing on the sidewall of a tyre, plays a very significant role in your choice of tyres for your vehicle? To help you understand this better, here are what some common sidewall markings represent:

A ? Tyre Width:

Indicates the cross section width of a tyre in mm.

B ? Aspect Ratio:

The height of the sidewall expressed as a percentage of the tyres width. A lower aspect ratio provides increased stability and speeds especially at higher speeds.

C ? Type of Construction:

Indicates how a tyre was built, in this case: R = Radial ply.

D ? Wheel Diameter:

Diameter of inner tyre edge, which corresponds to rim diameter expressed in inches.

E ? Load Index:

A code associated with the maximum load a tyre can carry at its maximum allowable speed.

F ? Speed Rating:

A code associated with the maximum speed a tyre can travel at.

G ? Tread Wear Indicator:

An indication of the tyre reaching its maximum life, and is usually set to 1.6mm. A tyre should be changed at/close to this point.

H ? Brand:

Displays the brand of a tyre.

I ? E-Mark:

This indicates an ECE marking, which represents the tyres conformity to European standards.

J ? Date of Manufacture:

Represents the Week and Year of manufacture of a tyre. AKA DOM. Eg. 2119 means that tyre was manufactured on the 21st week of year 2019.

K ? Pattern:

Displays the Pattern of a tyre