# Tire Size Letter Meaning

Most people don’t know what the letters on their tires mean. They see “P215/60R16” and have no idea what it means. Here’s a quick guide to tire size letters.

The first letter is the tire’s classification. “P” means passenger car tire, “T” means temporary spare, “LT” means light truck, and “C” means commercial truck. The second number is the width of the tire in millimeters.

The third number is the aspect ratio, which is the height of the sidewall as a percentage of the width. The fourth letter is the construction type. “R” means radial, while “B” means bias-ply.

When it comes to tires, there are a lot of different sizes and letters that can be confusing for consumers. Here is a breakdown of what the tire size lettering means.
The first letter on a tire usually denotes the type of vehicle the tire is meant for.

“P” means passenger car, “LT” means light truck, and “C” means commercial truck. The next number is the width of the tire in millimeters. The following two numbers are the aspect ratio, which is the height of the sidewall as a percentage of the width.

The last number is the wheel diameter in inches.
For example, a LT265/70R17 would be a light truck tire that is 265 mm wide with a 70% sidewall height ratio and 17 inch wheel diameter.

## How to Read a Tire Size & Understanding a Tire Sidewall – ABTL Auto Extras

## What Do the 3 Numbers Mean on Tire Size

When you’re shopping for new tires, you’ll notice that each tire has a series of numbers printed on the side. These numbers are the tire’s size. While it may look like random digits, the numbers actually provide important information about the tire’s dimensions and capabilities.

Here’s a quick guide to understanding what those numbers mean:
The first number is the width of the tire in millimeters. The second number is known as the aspect ratio and it represents the height of the sidewall as a percentage of the width.

The third number is called the diameter and it tells you how big around your wheel will be once the tire is mounted.
Knowing these three measurements can be helpful when trying to decide which size tire is right for your car or truck. For example, if you need a wider tire for better traction in off-road conditions, you would look for a size with a higher width measurement.

Conversely, if you’re looking for a smoother ride on paved roads, you would want to choose a size with a lower aspect ratio (meaning shorter sidewalls). And finally, if you need new tires because your current ones are causing your wheels to rub against your fenders, then you would need to select tires with a smaller diameter measurement.
Of course, there are other factors to consider when choosing new tires such as load capacity and speed rating.

But knowing these three key numbers will give you a good starting point in your search for just the right set of rubber!

Credit: www.lesschwab.com

## What Does the T Or H Mean on Tires?

Most people don’t know that there is meaning behind the T or H on tires. The T stands for temporary and the H stands for high-speed. The Temporary rating is given to a tire that can be used for a limited amount of time at high speeds.

These tires are not meant to be used all the time, but they can come in handy when you need them. The High-speed rating is given to a tire that can be used all the time at high speeds. This means that these tires are made for those who like to go fast and need a tire that can handle it.

## What Do the Numbers And Letters Mean on Tire Size?

When you’re shopping for tires, you’ll notice a long string of numbers and letters on the side of each tire. This string of characters is the tire size, and it provides important information about the size, load capacity, speed rating, and construction of the tire. Let’s take a closer look at what all those numbers and letters mean.

The first part of the tire size is the width. Tire width is measured in millimeters (mm), and it corresponds to the width of the tire from sidewall to sidewall. For example, a 225 mm tire is 225 millimeters wide.

The second part of the tire size is the aspect ratio. The aspect ratio is simply the height of the tire’s sidewall expressed as a percentage of its width. In other words, it’s how tall your tires are in comparison to how wide they are.

A 50% aspect ratio means that your tires are half as tall as they are wide. A lower aspect ratio indicates a taller sidewall (and a softer ride), while a higher aspect ratio signifies a shorter sidewall (and firmer handling).
The third part of the equation is wheel diameter.

Wheel diameter is expressed in inches and tells you how big your wheels are. Most passenger cars have wheels that measure between 14″ and 20″ in diameter. Larger trucks and SUVs may have wheels that are up to 24″ in diameter or even larger!

Now that we’ve covered width, height, and wheel diameter, let’s move on to load capacity and speed rating…

## What Does the D Mean in Tire Size?

When it comes to tires, the “D” in tire size stands for “diagonal.” diagonal tires are those that have a cross-section that is not perfectly round. These tires are designed for vehicles with rear-wheel drive (RWD) or four-wheel drive (4WD). The D designation helps to identify these tires when shopping for new ones.

While rounder tires are more common and provide better handling on dry roads, diagonal tires offer superior traction on loose surfaces like sand or snow. That’s because the sides of the tread make contact with the ground first, providing more grip as you turn corners.
If you’re looking for better traction and handling in off-road or winter driving conditions, then consider switching to a set of D-rated tires.

Just be aware that they may produce more noise on dry pavements and wear out faster than their standard counterparts.

## What Do the 3 Numbers on Tire Size Mean?

When you’re shopping for new tires, you’ll notice that each tire has a series of numbers printed on the sidewall. These numbers are the tire’s size. The first number is the width of the tire in millimeters.

The second number is the height, or aspect ratio, of the tire’s sidewall as a percentage of the width. The third number is the diameter of the wheel in inches.
Now that we know what each number means, let’s put it all together to see what a typical tire size might look like: 215/60R16.

In this example, our fictional tire has a width of 215 millimeters and an aspect ratio of 60%. That means that the height of our imaginary tire’s sidewall is 60% of its width, or 129mm (215mm x 0.60 = 129mm). To find out our wheel diameter, we simply look at the last number in our size series: 16 inches.

## Conclusion

Most people don’t know what the tire size letters mean on their car. Here’s a quick guide to help you understand what they mean. The first letter is the tire’s width.

The second letter is the aspect ratio, which is the height of the sidewall compared to the width. The third letter is the construction type. The fourth letter is the diameter of the wheel.