315/30R20 tire size
315/30R20 in inches: 27.44" overall diameter — 12.40" wide, 3.72" sidewall.
Overall diameter 27.44 in 697 mm
Section width 12.40 in 315 mm
Sidewall height 3.72 in 94.5 mm
Revs / mile 735 speedo calibration
Full dimensions
| Measurement | Metric | Imperial |
|---|---|---|
| Overall diameter | 697 mm | 27.44 in |
| Section width | 315 mm | 12.40 in |
| Sidewall height | 94.5 mm | 3.72 in |
| Rim diameter | 508 mm | 20 in |
| Circumference | 2189.7 mm | 86.21 in |
| Revolutions per mile | 735.0 | |
| Aspect ratio | 30% | |
Compare 315/30R20 to similar sizes
Frequently asked questions
What is the overall diameter of a 315/30R20 tire?
A 315/30R20 tire has an overall diameter of 27.44 inches (697 mm).
How tall is a 315/30R20 tire?
The sidewall height is 94.5 mm (3.72 inches), and the overall diameter from the ground to the top of the tire is 27.44 inches.
How many revolutions per mile does a 315/30R20 tire make?
A 315/30R20 tire makes approximately 735 revolutions per mile. Your speedometer is calibrated to this number.
What rim size does a 315/30R20 tire fit?
A 315/30R20 tire is designed for a 20-inch rim (508 mm).
All dimensions calculated using standard ETRTO formulas. Always confirm fitment with your vehicle's door-placard and a qualified tire professional before purchasing.