Tire size numbers explained. Use the guide below as a tire size decoder and watch our tire decoder video to learn more. 215: The width of the tire in millimeters. 50: The height of the sidewall as a percentage of the tire width (50 percent of 215 mm) R: Radial (a common type of modern tire) 17: The wheel diameter in inches — in this example The size of a tyre also contains other important information that defines its type of construction and the limits of its capabilities. Let's take a concrete example with the MICHELIN Road 6: As you can see, the sidewall of the tyre shows the following dimensions:
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On the sidewall, you will find 185/75R14 89T printed. 185 indicates the width of the tyre in millimetres (185 mm) 75 indicates its aspect ratio, a comparison of the tyre’s section height with its section width (75 indicates the height is 75% of its width) R indicates radial ply construction. 14 indicates the diameter of the wheel rim (14 inches) 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. Step 1: Learn the three main tire size numbers. The first thing to look for when looking to buy new tires is the current tire size that’s on your vehicle. I’ve outlined in-depth above what each tire size number means and left a quick overview below: Passenger vehicles/Truck tire size numbers (225/75R17) The first number = tire width . 142 192 7 466 137 31 333 231

how to read tyre dimensions