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Apr
After the forward slash the next number on our example tire is 65. Aspect ratiotire profileseries is the relation of the tires width and height in percent.
The ETRTO size specification 37-622 indicates the width of 37 mm and the tire inner diameter of 622 mm.
Tire sizes what do the numbers 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. C Commercial Example.
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. Tire size specifications are outlined by the numbers and letters found on the sidewall of tires. The first letter on a tire indicates the tires class.
P designates this tire as a passenger car tire an LT before the tire. 245 Section WidthTread mm 45 Aspect Ratio. Ratio of Sidewall height to width Z Speed Rating S 112mphT 118mph.
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. The first number in a tires size say 225 is the width of the tire in millimeters. Tire diameter inches xxxyy1270zz where tire size is commonly written PxxxyyRzz on the sidewall.
The first number is your overall diameter of the tire. In this example the tire diameter or height is 33 inches tall. The second number represents the width of the tire.
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. Aspect ratiotire profileseries is the relation of the tires width and height in percent.
So 55 profile is 55 of the width meaning the tires height is taking the width of 205 mm 11275 mm or 44. You may see tires without these tire numbers meaning the tires profile is standard 82. The ETRTO size specification 37-622 indicates the width of 37 mm and the tire inner diameter of 622 mm.
This dimension is clear and allows for precise classification of the rim size. 28 x 140 states the approximate outer diameter 28 inches and the tire width 140 inches. 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.
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.
The first number is 18 which means the tire is roughly 18 in diameter. The next number is 850 which means the tire is roughly 85 inches wide and the final number is 8 which means the tire mounts on a wheel with an 8 diameter. P identifies your tire as a Passenger Tire.
The P stands for PMetric. If your tire size starts with LT rather than a P than it identifies the tire as a Light Truck tire. 225 identifies the tire section width which is the measurement of the tire from sidewall to sidewall in millimeters.
Tire Width The next three-digit number tells you the tires size in millimetres. In the picture below the tire would be 215 mm wide measured from sidewall to sidewall.