🦄 How To Read Tyre Dimensions

The first number is the section width of the tire. The second number is the rim (wheel) size. For example if you take the 12x16.5 tire, the width or top tread area of the tire is going to be 12” wide, and the rim (wheel) size this tire would fit on would be 16.5” rim. Sometimes there are more than 2 numbers. 225/75R15 tires have a diameter of 28.3", a section width of 8.9", and a wheel diameter of 15". The circumference is 88.8" and they have 713 revolutions per mile. Generally they are approved to be mounted on 6-7.5" wide wheels for passenger tires and 6-7" for LT tires. Specs may vary by manufacturer. learn more. Standard ATV tire size numbers meaning: The overall height of the tire = 26 inches. The overall width of the tire = 10 inches. The wheel or rim diameter = 12 inches. 2. Metric ATV Tire Size. Metric ATV tire size formula is now rare to find because standard tire size formula is less complicated to understand. The three-digit number following the tire type code is the width of the tire measured in millimeters from sidewall to sidewall. The tire in the example has a width of 225mm. HOW TO READ THE SIDEWALL OF A TIRE You can convert the width measurement from millimeters to inches by dividing the width by 25.4. For example: 225mm / 25.4 = 8.86” TECH TIP The first number is the easiest and measures the width of the tyre in metric millimetres. 235 means your tyre is 235mm wide. 235/ 45 R17. The second number refers to the profile of the tyre or the height of the tyre’s sidewall. The number isn’t in millimetres but is instead an aspect ratio measurement of how the height relates to total width. Metric tire sizes are a bit demanding when it comes to understanding what size they really are. Those numbers are only good with the other two. A 33 is a 33 no matter what, but a 265/70/16 is a 30 1/2" tall tire and a 265/75R17 is a 32 1/2" tall tire. Speed Rating. To read the size of a tire, find the string of numbers with a forward slash. Sometimes the sequence will begin with a letter. The numbers may be upside-down depending on the wheel’s position when you stop the car. Either way, you’ll want to read the line from its left to its right. The height of the tire from rim to tread will be 88 percent of the width. An 11R22.5 tire will be approximately 11 inches wide and 9.5 inches high. Low profile tires show the width in millimeters and the aspect ratio. A 275/80R22.5 tire is 275 millimeters wide 220 millimeters high. Typical low aspect truck tire ratios are 70 percent, 75 percent Section width. The first number in a tire size is the width of the tire in millimeters. For example, an LT 265/75R18 has a section width of 265 millimeters, meaning the tread section is that wide. So clearly, the lower the number, the thinner the tire and the higher the number, the wider it is. A monkey wrench gets thrown into the equation when The tire size "P225/45R17 91V" may not mean much to the average person, but to tire geeks like us it speaks volumes. Read on to learn how to crack the tire code with this handy guide dedicated to tire types, sizes, and construction. Tire service type ratings. Most tire sizes begin with one or more letters -- for example, P or LT. The smaller the number the lower profile of the tire. In metric this is a ratio between height and width. ex. A 170/80 means the width is 170mm, and the height would be 80% of that. ) C - Rim diameter. D - Load capacity. E - Tire speed rating (ex. S=112mph, H=130mph, V=149mph, W=168mph) F - Tubeless (TL) or Tube Type (TT) tire. All ATV Tire sizes consist of 3 sets of numbers generally separated by dashes (ex. 25-8-12), forward slashes (ex. 25/8/12), or with an x (ex. 25x8x12). *If you would like to beef up your machine a little without having to lift it, we recommend only going 1" larger in height and width from the stock size. .

how to read tyre dimensions