Know Your Car’s Tyres

Besides from knowing the size of the tire, the majority of us have no idea about the tires nos. printed on the wheels & what do they mean.

Every car manufacturer recommends a specific sort of tire based on a few factors like- Car’s Weight, Engine’s Power, mileage and traction, the overall price of the car, etc.

  • However, when we go for the tire replacement, we simply follow the tire’s retailer advice & mostly he recommends that tire on which he gets max. commission.
  • To ensure that you don’t fall into this trap, we decided to disclose the puzzle behind these numbers to help you understand it better so that you can make a wise selection on your next tire purchase.
  • Now, whenever you’re going to purchase new tires for your car, check this basic guide to know which tires are perfect for your Car.


Most tire markings begin with at least one letter. In the picture above, it begins with P which states that this tire is meant only for Passenger Vehicle. However, there are different types of tires that are intended for other different types of vehicles, for example, LT for Light Truck or SUVs, ST for Special Trailer, C for commercial vehicles, for example, conveyance trucks and vans.

Tyre Width

Next comes, a three digit number that tells us the cross-sectional width of the tire in millimeters. The tire width, 185 is measured from the widest point of the inner sidewall to the widest point of the outer sidewall when properly mounted.

Aspect Ratio

It is a two digit number that indicates the distance of the sidewall from the wheel rim to the outside of the tread. We have 75 as the aspect ratio. A higher aspect ratio means a higher-profile tire with a taller sidewall while a tire with a low aspect ratio will have a shorter sidewall.

Tyre Manufacturing (R, D, B)

The letter that consists of the two-digits aspect ratio reveals the tire’s built & manufacturing/development. If a tire has an R rating” it implies that the tire has Radial manufacturing/development. Radial tires are those where the internal body consists of the tire crisscross outward from the center. On the off chance, if there’s a D rather than an R, the tire has a Bias Ply manufacturing/development, meaning that the internal body plies of the tire crisscross on a diagonal pattern. In Bias Belted tires (marked as B), the internal plies crisscross like in a D construction, but there’s also an extra layer of reinforcing belts under the tread area. Belted tires are rarely seen these days while 98% of cars have Radial tires.

Diameter (in inches):- 

This denotes the diameter of the wheel. The number 14 means that the tyre should be matched to a 14-inch diameter wheel.

Load Rating

This tells us how many pounds a tire can safely carry. The number 82 is assigned to a specific load carrying capacity of 1047 pounds (per tire).

Speed Rating

A Speed Rating of S means that the tire can easily achieve a speed of 180 km/h. It tells you how fast this tire can go. For more information on speed, ratings refer to the table below.

Subsequently after finding out that which tire will be best for you considering your driving style, next you should consider the weather condition in which you drive the most. On the off chance if you drive in the extreme weather conditions, ensure you pick Snow tires for colder regions & Wet tires for territories with substantial rainfall.

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