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