How to Read Your Tire Markings

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How to Read Your Tire Markings: The sidewalls of the tire contain all the relevant information pertaining to tires. This is all the information you need to know about the tires. Let us have a little guide regarding the numbers and letters and their relevance.


Tire Width

The width of your tire, in millimeters, measured from sidewall to sidewall.

Aspect ratio

It is a ratio with respect to tire’s cross-section to its width. It is expressed in the form of a percentage. An aspect ratio if 65, for instance, indicates that the height of the tire is 65% of its width.

Wheel diameter

The diameter (height) of the wheel in inches.

Load index

The load of the tire is related to its maximum carrying capacity. It is depicted in kilograms. You will find the load rating of your car’s tire on the sidewall. It is just to the right side of the diameter. Let us take an instance; a tire with a load index of say 91 can carry 615 kg of weight.

There are two types of rating load rating and speed ratings. These ratings should be looked at together whenever you buy a new tire. It is also a must to remember to check the manufacturer’s recommendation. The recommendation by the manufacturer may not be wrong in a certain sense.

Speed Rating

The speed rating is the maximum speed for a tire. You can determine maximum speed only when it is correctly inflated and used under load. At the end of the sidewall, there is a speed rating which is basically in letter form. It is after the load index number. If a tire has a speed rating of V, for instance, it has a maximum speed of 240 Km/ hour.

When you buy a new tire, it is important to make sure that you match their speed ratings with the speed capabilities of your vehicle.

Higher load indexes and different speed ratings

There can be a possibility to fit the tire with higher load indexes and different speed ratings. it is with respect to those indicated in the vehicle’s manufacturer documentation.

But it is important to always check first in your vehicle’s manufacturer documentation. It is for the purpose that these tires are permitted under local laws and regulations. You must comply with all applicable requirements of your local laws and regulations. It must exceed the specification of the tires as well as those indicated in the documentation. The dealer may help you verify before you purchase or fit tires.

Warning: it is vital to check your vehicle owner’s manual to determine the load limits. If you overload your vehicle it places stress on your tires and other critical vehicle components. It may also cause poor handling, increase fuel consumption, and also cause tire failure. It may also lead to severe cracking, component separation, or blowout.

Type of tire: the Letter P or in case there is no letter at all, shows that it is a passenger car tire.

Construction: The letter “R” stands for radial. Nowadays every now and then people prefer radical tires, thus this is what is going on-trend. 

Tyre pressure information: This is the basically maximum inflation pressure of your tire. It is better to consult the vehicle’s manual for further information to know about the tire pressure.

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