What Is Tire Aspect Ratio

If a tire has an aspect ratio of 70, it means the tire’s height is 70% of its width.

Tire aspect ratios are designed to be flexible. Tire sizes are adjusted with different numeric and alphanumeric identifications that allow for flexibility in tread depth as well as load-carrying capacity.

How important is the aspect ratio on a tire?

Aspect Ratio On A Tire-

Aspect ratio is the tire’s cross-section height compared to its width. It is the second number in standard tire size. For example, in a size P195/50R15 tire, the 50 means that the height is 50% of the tire’s width.

Is it OK to change the tire aspect ratio?

Changing Tire Aspect Ratio

In most cases yes, you can change aspect ratios. However, there are some exceptions: You should never increase rim diameter by more than three inches or decrease by more than one inch above or below the original size without consulting your vehicle manufacturer for guidance on safe performance handling characteristics of your vehicle with such change(s).

What is the aspect ratio of a tire?

The Aspect Ratio of a Tire Means

The aspect ratio is the relationship of the tire’s height to its width, expressed as a percentage. In other words, if a tire is 6 inches wide and its height is 50 percent of that width, it has an aspect ratio of 50. When you see a tire size beginning with P205/55R16, for example, the number 55 indicates that the tire’s height is equal to 55 percent of its width.

Does tire aspect ratio affect speedometer?

Tire Size and Speedometer Calculation

Yes. Tires with shorter sidewalls will cause your speedometer to read faster than you are actually traveling and tall tires will cause it to read slower than you are actually traveling.

Can I use 225 tires instead of 235?

Can 235 Tires Replace 225

The aspect ratio or aspect percentage is the ratio of width to height. A tire with an aspect ratio of 225/235 has a width-to-height ratio of 1.5:1, while a tire with an aspect ratio of 36/24 has a width-to-height ratio of 3:1.

The smaller the aspect ratio, the more “fender bender” friendly your car is. The larger the aspect ratio, the more stable your car will be at high speeds.

What is the profile/aspect ratio?

Second Life Profile Aspect Ratio

The first number, which appears before the slash, is the tire’s section width in millimeters when it’s mounted and inflated.

This number represents the distance from one sidewall of the tire to the other sidewall. For example, if you take the height of a building and divide it by its width, you will get a number that represents the building’s aspect ratio.

What is the A/R ratio of a tire?

The AR Ratio Of A Tire

The aspect ratio is the height of a tire’s cross-section to its width. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall.

For example, in this Pirelli tire, the aspect ratio is 45, which means that the height is equal to 45% of the tire’s width. The larger the aspect ratio, the bigger the tire’s sidewall will be.

What are the different parts of a tire?

The sidewall is like a tire’s personality. It shows what type of vehicle it was designed for and if it’s made for speed or traction in inclement weather. Most tires have both metric and common sizes printed on their sidewalls.

On light truck tires, the second number indicates the load-carrying capacity at maximum air pressure. The first number indicates its load-carrying capacity at a lower pressure. In this case, larger numbers, in either case, indicate heavier load-carrying capacity.


A tire’s aspect ratio is an expression of height to width, and the higher the aspect ratio, the taller the sidewall. For example, a tire with an aspect ratio of 60 has a sidewall height that is 60 percent of its tread width.

On a metric-sized tire, you’ll find the aspect ratio after the first dash in the size designation. Thank you so much for reading this article.

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