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What does it mean?

The tyre section width is the linear distance in millimetres between the outside of the sidewalls of an inflated tyre excluding elevations due to labelling (markings), decorations, or protective bands or rims.

What does it mean?

Section height is half the difference between the overall diameter and the nominal rim diameter. In the course of tyre history the shape of the tyre has changed from an almost circular tyre to flatter, wider tyres. This has changed the relationship or aspect ratio (A/R) of the tyre section height to the section width from 100% to 70%, 60%, 50%, and even lower.

What does it mean?

The diagram below shows the actual point of measurement which determines the nominal rim diameter.

What does it mean?

Load indices and speed symbols are shown on both tyre sidewalls. The first number denotes the tyre load carrying capacity in SINGLE application, while the second number refers to DUAL fitment.
M+S (winter/4x4) tyres with a lower speed rating than that of the vehicle may be fitted. In some countries it is mandatory that a sticker be placed in the view of the driver indicating the maximum speed of the tyre.
This speed may not be exceeded while these tyres are fitted.

The SPEED SYMBOL denotes the maximum speed at which a given tyre can carry the load indicated by the load index. Only those tyres with a minimum speed rating as shown in the vehicle papers may be used on the vehicle. Not valid for V, W, Y, Z.

What does it mean?

The maximum load capacity is indicated by the Load Index. The scale below shows the relationship between the Load Index (LI) and actual load values in kilograms (kg).