![]() ![]() If you’re thinking about putting a tire with a different aspect ratio on your car, there are a few things you need to know. ![]() With so many options out there, it’s important to make sure you get the right size for your car and driving needs! Can You Put a Tire With a Different Aspect Ratio on Your Car? If you’re still unsure about what size tire to get, consult with a professional or do some more research online. If you’re mostly on highways, you’ll want a different size than if you’re doing a lot of city driving or off-roading. You also need to consider the type of driving you’ll be doing most often. Keep in mind that not all sizes will work with all cars- some may be too big or too small. Now that you know all three measurements, you can start to narrow down what size tire will fit your car. Finally, you need to know the diameter of your wheel, which is usually measured in inches. This is usually expressed as a percentage and will be between 35% and 55%. Next is the aspect ratio, which is the height of your tire compared to its width. This is typically measured in millimeters and will be somewhere between 155 and 295 mm. When it comes to your tires, there are a few things you need to take into account in order to make sure you have the right size. Now that you know how to read a tire size, you can be sure you’re getting exactly what you need when shopping for new tires! How Do I Know My Tire Size is Compatible? In this case, “P” indicates passenger car classification 215 is the width in mm 65 is the aspect ratio R means radial construction 15 indicatesthe diameter in inches 95 isthe load index and His th e speed rating. To put it all together, an example tire size might look like this: P215/65R15 95H. Finally, there are two numbers after the diameter that indicate the load index and speed rating. ![]() The third number is the diameter and is measured in inches. ![]() This is a percentage of the width and is followed by an “R” (for example, 65R). The second number is the height, also known as the aspect ratio. The width is the first number in the size and is measured in millimeters (mm). This can all be a bit confusing, but luckily there’s a formula that can help make sense of it all. The size is typically made up of a series of numbers and letters that provide information on the width, height, diameter, load index and speed rating. When it comes to shopping for tires, one of the most important things to know is the size of the tire. 4 For example, if your tires have a width of 205 mm and an aspect ratio of 55%, their diameter would be calculated as follows: 25 / 55% = 45Ĭredit: What is the Formula for Tire Size?.To calculate the diameter of the wheel, divide 25 by this number (the aspect ratio).55 to determine the height of the tire, or its aspect ratio.This is the distance from one sidewall to the other.Determine the width of the tire in millimeters.For example, if a tire has a sidewall height of 55 millimeters (mm) and a width of 195 mm, its aspect ratio would be 55 ÷ 195 = 0.28 or 28%. To calculate it, simply divide the tire’s sidewall height by its width. The higher the number, the taller the sidewall and the narrower the tire. The lower the number, the shorter the sidewall and the wider the tire. Tire aspect ratio is the height of a tire’s sidewall expressed as a percentage of its width. ![]()
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