How do you decode a tire number?
How do you decode a tire number?
The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.
What does R mean on tires?
radial construction
R indicates the construction used within the tires casing. R stands for radial construction. B means belted bias and D stands for diagonal bias construction. Each letter coincides to the maximum speed a tire can sustain under its recommended load capacity. For instance, S is equivalent to a maximum speed of 112 mph.
Where can I find a tire conversion chart?
Every tire size is listed with its metric measurements and inch size equivalent. If the tire conversion charts aren’t for you don’t forget to try out our tire calculators for individual tire conversions. By using our site you agree to our policies including the use of cookies.
Where are the letters and numbers on a car tyre?
“A good place for car owners to start is to check the existing tyres on their car. On the sidewall are numbers and letters which give the tyre’s width, profile, diameter, load index and speed rating.
What do the letters stand for in tire code?
An optional letter (or letters) indicating the intended use or vehicle class for the tire: P: Passenger Car LT: Light Truck ST: Special Trailer T: Temporary (restricted usage for “space-saver” spare wheels) 1 P: Passenger Car 2 LT: Light Truck 3 ST: Special Trailer 4 T: Temporary (restricted usage for “space-saver” spare wheels)
How do you convert tire size to wheel size?
Just enter the size of tire you have now, then the new wheel size you want to go with and click “convert equivalent”. There you go, the equal tire size on a different size wheel using the tire converter on the right.
What do the letters mean on a tire?
The higher the number, the larger the sidewall. For a P185/75 R17 82S tire, the aspect ratio would be 75, meaning the sidewall’s height is 75% of the tire’s width, or about 5.5 inches. The set of letters after the aspect ratio indicates the tire’s construction.
What is the 3 digit number for tire width?
The three-digit number following the tire class is the tire width. The width is the distance of the tire from sidewall to sidewall in millimeters. For a P185/75 R17 82S tire, the aspect ratio would be 185. This means that the tire’s width is 185mm, or about 7.3 inches.
How are tire sizes converted from metric to inches?
Our simple tire size conversion chart clearly lists the various metric tire size designations side-by-side with their size equivalents in inches. Tire size is designated by the long sequence of letters and numbers branded on your tires’ sidewalls.
What does the number are mean on a tire?
After the letter R, a number that indicates the wheel size where it fits. So for the example, P225/45R17 91V, R17 means the tire is made of radial-ply construction and that it fits a 17-inch rim. It’s a common knowledge for car owners that tires only fit a wheel that has an identical inner diameter with it.
