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Understanding Tyre Code And Markings

skyautoblogger December 22, 2021

Have you ever noticed a bunch of alpha-numeric markings on the side of your tyres? No, these are not some secret mechanic code that companies may be used to talk behind your back. You are not the only one who might be feeling confused when you look at these markings. After all, not a lot many know what car tyre markings really are.

Car Tyres Colindale are available in a wide range of sizes, builds and features and most vehicles are able to support more than one size choice. This might make picking the proper tyre for your vehicle difficult at times. Fitting the proper tyres on your car is critical not just to its overall performance but also to its safety. How can you make sure that the tyres you are choosing are the most ideal ones for your vehicle?

This is where Tyre Reading comes in. If you, like many others, are unaware of what a tyre reading is and how it can help you, then this is the place for you to be.

Keep on reading to familiarise yourself with the concept of car tyre reading:

Tyre Reading:

Car Tyre reading is an alpha-numeric code on the sidewall of your tyre engraved by the tyre manufacturer. For those who know what each letter and number indicate; These markings indicate all one needs to know about it, from the name of the tyre’s maker to its size, kind, construction, and radial. This combination of letters and numbers even indicates the tyre’s speed and weight carrying capabilities.

Is it important to know how to read tyre readings?

Understanding what tyre reading means has become increasingly important in recent years, as it assists you in not only vehicle maintenance and repair, but also in selecting the best set of tyres for yourself, based on the demands of your vehicle and your driving style. Buying tyres that are ideal for your vehicle are directly related to the overall performance of your vehicle, from acceleration to vehicle handling, fuel economy, and tread traction, is linked to how your tyres function, making it all the more important to understand what it all means.

Tyre Reading Breakdown:

As discussed above, a car tyre’s reading can tell you all there is to know about a tyre. When you know what you are looking for, it makes the process of tyre selection all the more easier. A tyre reading can tell you the following about the tyre-

  • Tyre Width
  • Aspect Ratio
  • Construction
  • Radial/Rim Diameter
  • Load and Speed Index

Let’s have a more thorough look at each of these markings and know what they can tell us about the tyre in question-

Tyre Width

In a tyre marking, the foremost 3 digit number indicates the width of the tyre in millimetres. This is the tyre’s maximum width, measured from the extreme width of one sidewall to the same point on the opposite sidewall.

Choosing the appropriate width of your tyres is crucial because driving with tyres that are too wide for your vehicle can cause a variety of issues including poor performance, premature suspension wear, and an abnormal spike in engine load.

Aspect Ratio

The aspect ratio of the tyre is indicated by the number after the tyre width marker. It is the sidewall height measured from the rim to the tread and expressed in terms of percentage. It is also known as the tyre profile. The greater this value is, the higher a tyre’s sidewalls are.

Construction of the Tyre

The next marking in the reading is indicated by a letter and signifies what kind of internal structure your tyres have. This is important to know as different tyre constructions and structure displays different performance results and features in a tyre.

These are usually indicated by the letters ‘R’, ‘B’ and ‘D’ meaning radial ply, bias-ply or diagonal ply respectively. Out of all these Radial ply is the most commonly used construction type. It can even be considered a standard norm.

Radial or Rim Diameter

Up next on the tyre marking are the digits that indicate the diameter of the tyre rims expressed in inches. Considering the type of tyres you choose is dictated by the size of the rims you need, this is likely the most important number in a car tyre reading.

Load and Speed Index

The final alpha-numeric marking on the car tyre reading indicates the maximum weight and speed limit of the tyre collectively.

The load index, often known as the tyre load rating, tells us how much weight a given tyre can handle at the appropriate tyre pressure. The values in the load index range from 60 to 179, representing carrying capabilities of 250 to 7750 kg.

Whereas, the speed index indicated by a letter, signifies the maximum speed limit of the said tyre, given that it is in excellent condition with bare minimum wear and tear. Speed Index of the tyre are indicated by letters ranging from A to Z, each letter having its own unique speed limit associated with it.

So the next time you are looking to buy yourself an ideal set of Hankook Tyres Edgware, you can confidently browse through the auto shop knowing everything there is to know about these tyres.

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