31X18R20 tires are 31.0″ tall, have a section width of 18.0″, and fit wheels with a diameter of 20. The circumference is 97.3″ that translates into 651 revolutions per mile. As a rule, they can be mounted on the wheels with 20″ rim width. In the metric system, the equivalent tire size is 457/31/R20.
What is 31X18R20 in inches?
|Tire Section Width:||18.0″|
|Rim Width Range:||20″|
Alternate sizes – Upsizing Wheels or Tires?
What are 31X18R20 close equivalents?
Check out the chart below to find possible alternatives to the 31X18R20 tire size staying within the 3%-range of the tire diameter, allowing to choose wider wheels or tires with smaller sidewalls. A good rule of thumb is to avoid decreasing the diameter of the wheel. If you are not sure about the custom sizes, consult the experts or stick to the factory tire size.
|Tire size||Diameter||Difference||Width||Wheel size|
How to decode 31X18R20 tire size in metric?
Trying to decode the size of the tires? Scroll down the page to learn what all these numbers on the sidewall stand for.
|P or LT||The first letter in the string denotes the class. P stands for passenger vehicles, LT is intended for light trucks carrying heavy loads.|
|457||It means the width of the tire is 457 millimeters|
|31||The tire has an aspect ratio of 31. To put it simple, the sidewall height is 31% of the width, so it would be 5.5″.|
|R||R stands for the Radial, a standard construction method for about 99% of tires.|
|20||The tire is designed to fit 20″ rims that are 20 inches in diameter.|
Popular questions about 31X18R20 tire size
How wide is a 31X18R20 tire?
The tires of the given size have a section width of 18.0″ inches.
How tall is a 31X18R20 tire?
The height of the following tire size equals 31.0″ inches.
What rims will fit 31X18R20 tires?
For each tire size, often there are several wheel sizes. You can’t put very wide tires on narrow rims or vise versa. You need the rim size of 20″ for 20″ tires.