The profile is 80% of the width. The two-digit number that comes after the slash is your profile, also known as the aspect ratio. This number is a percentage of your tyre’s width and represents the depth of the sidewall (the sidewall is the wall at the side of your tyre). So, the tyre’s profile is 80% of its width, or 124mm.
In this example, the height of the tires would be 70.The aspect ratio is given as a percentage of the tire’s tread width. It is measured from the wheel rim to the top of the tread. In the example above, the 14-inch tires would have a sidewall height that is 70% of the tread width. 70% of 215mm is 150.5mm.
The last letter in a standard tire size indicates the number of layers used in the construction of the tire. If there is no letter, the tire has the standard 4 plies. A “C” indicates 6 plies, a “D” indicates 8 plies, and an “E” indicates 10 plies. The higher the number of plies in a tire, the stronger the tire is and the more air
Wheel width in inches and millimeters. Minimum tire width in inches and millimeters. Ideal tire width in inches and millimeters. Maximum tire width in inches and millimeters. 5.0 inches 127 millimeters. 155 millimeters 6.1 inches. 165 or 175 millimeters 6.4 or 6.8 inches. 185 millimeters 7.2 inches. 5.5 inches 139.7 millimeters.
1 Key Takeaways. 2 Where to Find the Tire Size. 3 How to Read Tire Sizes. 3.1 The First Letter: Tire Types — P225/50R17 98H. 3.2 The Next Few Numbers: Width of Tire—P225/50R17 98H. 3.3 Numbers After the Slash: Aspect Ratio—P225/50R17 98H. 3.4 The Following Letter: Internal Construction Type/Tire Type—P225/50R17 98H.
In the overview on the right you can see the most common truck and trailer tyre sizes. The first 3 digits are the width of the truck tyre. The 2 digits after the slash ( / ) indicates the height of a tyre in a percentage. The letter R indicated that the tyre is a Radial type tyre. The diggets after the R represent the size of the tyre in Inches.
. 133 524 808 687 933 992 405 765
how to read tyre dimensions
