Understanding the Tyre Size of Your Vehicle

Posted on: Aug 18, 2023 | | Written by:

Understanding the Tyre Size of Your Vehicle

Published on August 14, 2023. EST READ TIME: 3 minutes

Tyres are the only thing that connects your car to the road. It should not come as a surprise then, that tyres play an instrumental role in driving dynamics and taking care of your car. They not only help you steer the vehicle in the direction that you want but also provide grip, safety, and comfort. It is for this reason that car manufacturers suggest a specific tyre size for a car. Since it impacts performance, fuel efficiency, safety, and comfort levels, you must look at the tyre size specification for any sort of upgrade.

Understanding what tyre size means

Every time you hear tyre size, it refers to the dimensions of a tyre. It includes the width of the tyre, its diameter and aspect ratio. These numbers are usually present on the sidewall of a tyre. If you were wondering what some of these numbers represent, it is the tyre size.

Understanding tyre size specification and its measurement

The size of a tyre is measured using the Metric System, which is a standard system for measurements. As for tyre size specification, has several criteria like tyre size, the load index of the tyre and the speed symbol as well. It is important to note that the specification can vary based on the car manufacturer and its model.

Reading a tyre size

Though you might not have to memorise it, understanding how to read your tyre size can be helpful, if you want to sound like a pro during the negotiations. If your existing tyre has a text something like P195/55R16 87V, here is what everything means.

1. The alphabet P denotes passenger vehicles. In other words, you can use it on cars, SUVs and even vans.

2. 195 stands for 195mm or the width of the tyre, from one edge to another. 205mm would translate to a wider tyre as compared to 195mm.

3. 55 in the tyre size refers to the aspect ratio of the tyre. In simple words, it is the percentage of the width of the tyre. In the above example, the sidewall height is 55% of the width of the tyre.

4. R is the most common mode of tyre construction these days and stands for Radial.

5. The number 16 refers to the diameter of the tyre in inches.

6. The number 87 denotes the load index of the tyre. In this example, 87 is the maximum weight that the tyre can support when it is inflated to its rated pressure. A tyre with a load index of 87 can support a total weight of 545 kilometres. You can refer to a load index chart to find out the total weight that a car can support.

7. And lastly, the alphabet V is the speed rating of the tyre. In the above example, V means that the tyre can handle a maximum speed of 240 kilometres per hour.

Understanding the importance of aspect ratio

As we have already covered, the aspect ratio of tyre size refers to the width of the sidewall. A tyre with an aspect ratio of 55 means that the height of the sidewall is 55% of the total width of the tyre. Any tyre with a lower aspect ratio would translate to better handling but it can result in a stiffer ride which can be a bit uncomfortable. On the other hand, a tyre with a higher aspect ratio would translate to a higher sidewall and a more comfortable ride as it offers better traction and cushioning against road undulations.

Tyre size comparison

You must take a look at the tyre size specification and pick the right diameter of the tyre. Opting for a different diameter size can alter some of the dynamics of the car, such as the speed and fuel economy. A larger tyre can show slower speeds on the speedometer and vice versa. Once you have the right diameter, you can proceed with tyre size comparison.

Why you must choose the right tyre size

You can look at the tyre size chart before choosing a tyre for your car. However, it is critical that you choose the right size for a well-rounded experience. Here are some reasons why the right tyre matters.

1. Comfort and handling

By now we know that the aspect ratio can impact the handling of the car. Similarly, you can look for the right tyre size for better comfort or even fuel efficiency. There are a few tyres that offer low rolling resistance, which can be great for fuel efficiency.

2. Safety

Choosing a tyre with a lower load rating would mean that your car cannot handle the weight of the car and passengers. On the other hand, if you opt for a tyre with a higher load rating, it will result in higher rolling resistance and even increases the chances of rolling over. Having the right car insurance policy will offer an additional level of safety.

Some factors to consider while choosing the tyre size

Here are a few factors that you must consider before you choose the next tyre for your car.

1. Driving conditions

If you anticipate a lot of highway driving, you can opt for a tyre that offers better fuel efficiency and a more comfortable ride. Contrary to that, if you expect to drive on rough roads and terrains, you can look for a tyre with better traction and long-lasting nature.

2. Car type

If you own a hatchback, a narrow tyre might just suffice. While an SUV would require a wider tyre for its normal operation. A quick look at the tyre size chart will give you a better idea.

Why you should use a tyre size calculator?

By taking the help of a tyre size chart and calculator, you can choose the apt tyre for your car. During tyre size comparison, you can look at sizes and diameters and shod the right tyre for your car. You can even check the compatibility with your car.

Frequently asked questions

1. Where can I check recommended type for my car?

Your car's manual will have the recommended tyre size for your car.

2. Can I use a different tyre size?

While it is possible to use a different tyre size, it comes with downsides.

Conclusion

With the above information, you should be able to choose the right tyre for your car. The right tyre along with comprehensive insurance will ensure that your ownership experience is smooth and hassle-free. Though the law mandates third party insurance , a comprehensive plan offers better coverage.

Disclaimer: The above information is for illustrative purposes only. For more details, please refer to the policy wordings and prospectus before concluding the sales.

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