What's the purpose of all the numbers and symbols on the sidewall of the tyre? There's a lot of information located here, and you'd be forgiven for feeling a little puzzled. But these tyre sidewall markings are standard and required by law, so for your safety it's important to understand what they mean.
One way they help, for example, is with tyre selection for your car. First and foremost, each tyre must be suitable for the vehicle. This applies to its outer dimensions (diameter, rolling circumference, width) which are indicated in the tyre's standardised size designation.
In addition, the tyre must comply with the manufacturer's vehicle requirements in terms of load and speed.
The data in the charts below will make things clearer. Consult these three tables and you can interpret sidewall markings for factors like speed rating, tyre size, height, load index, tread wear indicator, and the tyre age.
There's also a handy visual guide showing how to read a tyre sidewall, which you can refer to in tandem with the vehicle handbook for complete safety and peace of mind.
Sidewall markings include:
Click to enlarge the image below to see where you can find all the markings on your car tyres: