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Tyre Sidewall Markings

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tyre sidewall

In our many years of experience as a car service provider, we have noticed that many of our patrons are unsure about what the inscriptions on the tyres’ sidewalls mean. As a result, they find it difficult to choose a product that would be the perfect fit for their cars.

The sidewall markings on a tyre may look like gibberish to the untrained eyes. However, if you know how to read it, those alphabets and digits can tell you everything you need to know about that particular tyre. Phillips Tyres actively tries to educate its clients on the importance of sidewall markings and how to read them.

What do the inscriptions depict?

The sidewall markings of a tyre depict some critical specifications of that particular model. First and foremost, the size of the tyre is inscribed on its sidewalls. It is the first thing that you have to consider while purchasing a set of tyres. Every car model has a particular size that it is compatible with. It’s paramount that you fit tyres that are recommended by the manufacturer.

The sidewall markings also depict some other critical elements of a tyre such as its load capacity and speed rating (the maximum speed limit for that particular tyre). The month and year of manufacturing are also inscribed on a tyre’s sidewalls.

How to read sidewall markings?

The sidewall marking on a tyre is an alpha-numeric code, with each digit and alphabet representing different aspects. It’ll be easier to understand with an example. Let’s say, you locate a tyre on our shelves that reads 215/60 R19 93Y.

Tyre width: The first three digits, 215, represent the tyre width in mm.

Aspect ratio: Aspect ratio refers to the height of a tyre as a percentage of its width. Here, it is 60, which means that the height of the tyre is 60% of its width, or 129mm.

Construction: There are two primary types of tyre constructions used today- radial and bias-ply. ‘R’ in the sidewall inscription denotes that the tyre is a radial one.

Diameter of the rim: The two digits following ‘R’ represent the rim diameter (in inches) this tyre is compatible with.

Load capacity: The last two digits denote its load capacity. ‘93’ expresses that this tyre can carry a load of 650kg safely.

Speed rating: This tyre comes with a Y-speed rating which means that it can travel at a maximum speed of 186mph.

Buy tyres from Phillips Tyres in Bicester

Every tyre that we sell at our garage has the appropriate sidewall markings inscribed on them so that you can easily choose a set that best corresponds to your requirements. If you are still unsure, our experts will guide you through the process.

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