What Do The Numbers In Tire Sizes Mean

The next two numbers after the width of the tire show the sidewall height in the percentage of the tires width. Next you will find a slash and then another set of numbers.

How Tyre Sizes Work What Do The Numbers Mean Drive It

So if the tire markings indicate P22545R17 91V it means that the height of the sidewall is 225 multiplied by 055 or 10125 millimeters.

What do the numbers in tire sizes mean. Understanding Three Numbers in Tire Sizes. The dash - indicates the tire construction is bias-ply but this could be an R if the tire is radial. The number 45 means that the height is equal to 45 percent of the width.

TIRE WIDTH The three-digit number following the letter is the tires width from side to side looking at the tire head on in millimeters. In example A this reads 1250 meaning the tire width is 12 and 12 inches. The table at the.

C Commercial Example. This is the width of the tire across in inches second number 10. The final number group the 18 is the size of wheel the tire fits.

245 Section WidthTread mm The section width is the width of the tire from one sidewall to the other measured in millimeters. This number is a percentage that indicates the tires height vs. In the size 25800-12 the meaning of the numbers is as follows.

Inch sizes are not precise and lack accuracy. After the forward slash the next number on our example tire is 65. 1 These are some of the most important numbers on any tire as they tell you how big your tires are.

This is the tires aspect ratio or its percentage of width to sidewall height. Tire sizes are defined by specifications such as the type width aspect ratio speed rating tire construction type and service description. 800 - The overall width of the tire.

In most cases with inch measurement tires the width will have a50 decimal after the initial number. You may see tires without these tire numbers meaning the tires profile is standard 82. In this case the tire is 245 millimeters at its widest point when its mounted on a wheel of.

Some manufacturers build off-road tires using inches instead of millimeters so you may see sizes like 3317 This simply means the total height of the tire is 33 inches and it fits a 17-inch wheel. This is the wheel size the tire should be mounted on last number As you can see above golf cart tires are typically classified with METRIC measurements most low profile street tires or STANDARD measurements most All Terrain Turf Lifted tires. The two-digit number after the slash mark in a tire size is the aspect ratio.

31x1050R15 C 109R Euro-Metric tire sizes ending with a C are commercial tires for use on delivery trucks and vans capable of carrying heavy loads. 28 x 140 states the approximate outer diameter 28 inches and the tire width 140 inches. If theres no letter before the first number you have a metric tire most commonly referred to as European size.

As an example if a tire size has two sets of numbers 6-12 500-15 112-24 then the first number 500 -15 is the approximate width in inches and the second number 500- 15 is the rim diameter in inches. The first number in a tires size say 225. The 149 means the tire is 149 inches wide and the 42 tells us that this tire fits a 42-inch diameter wheel.

In our example size the tire will fit a 18-inch wheel. Is the ratio of the height of the tires cross-section to its width. Inch marking such as 28 x 1 58 x 1 38 approximate outer diameter x tire height x tire width is also common.

In this case 65 means that the tires height is. In the example above the aspect ratio of our tire is 65 meaning that this tires height is 65 of its width. It is important that we understand tire geometry and be informed of the parameters that govern their performance.

Its also measured in millimeters but may have different load capacity than a P or LT tire. An example of tractor tire sizes expressed in the standard format would be 149-42. 25 - The overall height of the tire when mounted and inflated.

The aspect ratio sometimes called the tires profile. Tire size specifications are outlined by the numbers and letters found on the sidewall of tires.

Tire Size Explained What Do All The Numbers Mean The Vehicle Lab