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In our example size the tire will fit a 18-inch wheel. The final number simply is the wheel size or diameterof the wheel that the tire will fit on.
For example if the aspect ratio is 90 that means that your tires cross-sectional height is 90 of its width.
What do the numbers on tire sizes mean. Is the ratio of the height of the tires cross-section to its width. The two-digit number after the slash mark in a tire size is the aspect ratio. The two-digit number that usually follows the tires section width tells us the aspect ratio or tire profile measurement.
P designates this tire as a passenger car tire an LT before the tire size would mean the tire is a light truck tire and a European metric tire would have no letter before the tire size. 245 Section WidthTread mm The section width is the width of the tire from one sidewall to the other measured in millimeters. For example the number 60 in the above illustration represents that the height is equal to 60 of the width.
The final number group the 18 is the size of wheel the tire fits. In our example size the tire will fit a 18-inch wheel. 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.
If theres no letter before the first number you have a metric tire most commonly referred to as European size. Its also measured in millimeters but may have different load capacity than a P or LT tire. 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.
Understanding Three Numbers in Tire Sizes. The first number in a tires size say 225. If a tire size has three sets of numbers 15x600-6 26x1200-12 31x1550-15 then the first number 26x1200-12 is the approximate height in inches the second number 26x1200-12 is the approximate width in inches and the third number 26x1200-12 is the rim diameter in inches.
You may see tires without these tire numbers meaning the tires profile is standard 82. In example A this reads 1250 meaning the tire width is 12 and 12 inches. The final number simply is the wheel size or diameterof the wheel that the tire will fit on.
In the size 25800-12 the meaning of the numbers is as follows. 25 - The overall height of the tire when mounted and inflated. 800 - The overall width of the tire when mounted and inflated.
12 - The diameter of the wheel this tire will mount to. A smaller number means a lower profile and the height-to-width ratio is shown as a percent. For example if the aspect ratio is 90 that means that your tires cross-sectional height is 90 of its width.
If the tire has the metric alpha or low-profile inch numbering system the aspect ratio will appear immediately after the width. Next you will find a slash and then another set of numbers. The aspect ratio sometimes called the tires profile.
This number is a percentage that indicates the tires height vs. In the example above the aspect ratio of our tire is 65 meaning that this tires height is 65 of its width. The load index and speed rating or service description are the numbers that follow the tire size.
The load index tells you how much weight the tire can support when properly inflated. Load indices range from 75 - 105 for passenger tires with each numeric value corresponding to a certain carrying capacity. 1 These are some of the most important numbers on any tire as they tell you how big your tires are.
In this case the tire is 245 millimeters at its widest point when its mounted on a wheel of. This is the width of the tire across in inches second number 10. 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 table at the. After the forward slash the next number on our example tire is 65. This is the tires aspect ratio or its percentage of width to sidewall height.
In this case 65 means that the tires height is. 28 x 140 states the approximate outer diameter 28 inches and the tire width 140 inches. Inch marking such as 28 x 1 58 x 1 38 approximate outer diameter x tire height x tire width is also common.
Inch sizes are not precise and lack accuracy.