What does 315/40R25 mean?
315/40R25 is a tire size with the following dimensions:
- 315 is the width of the tire in millimeters. This number also indicates the appropriate width of the rim on which the tire should be mounted.
- 40 is the aspect ratio, which is the ratio of the tire's height to its width. This affects the tire's handling and ride comfort
- R indicates the tire's construction type, meaning it has a radial construction. This provides stability and precision to the tire.
- 25 is the diameter of the wheel in inches, on which the tire is to be mounted.
315/40R25 Tire Conversion
| Dimensions | Inches | Millimeters |
| Tire Diameter | 34.9 in | 887 mm |
| Section Width | 12.4 in | 315 mm |
| Rim Height | 25 in | 635 mm |
| Sidewall Height | 5 in | 126 mm |
| Circumference | 109.7 in | 2786.6 mm |
| Revolutions | 577.5 revs/mile | |
Not the tire size you are searching for? Try our Tire Size Calculator.
FAQ About 315/40R25 Tire
How tall is a 315/40R25 tire?
The height (or diameter) of a 315/40R25 tire is 34.9 inches
How wide is a 315/40R25 tire?
The width of a 315/40R25 tire is 315 mm, which is about 12.4 inches.
What size rim fits a 315/40R25 tire?
A 315/40R25 tire fits on a rim that is 25 inches in diameter.
What does the 40 in a 315/40R25 tire mean?
The 40 in a 315/40R25 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 40% of its width.
Alternative Tire Sizes for 315/40R25
Typically, it's recommended to choose a tire with a diameter (height) within 3% of the original equipment manufacturer (OEM) tire size.
However, keep in mind that this is a general guideline and not an absolute rule.
Here are some tire sizes that are compatible with the 315/40R25:
| Tire Size | Diameter | Rim |
|---|