175/80R18 tire size
175/80R18 in inches: 29.02" overall diameter — 6.89" wide, 5.51" sidewall.
Overall diameter 29.02 in 737.2 mm
Section width 6.89 in 175 mm
Sidewall height 5.51 in 140 mm
Revs / mile 695 speedo calibration
Full dimensions
| Measurement | Metric | Imperial |
|---|---|---|
| Overall diameter | 737.2 mm | 29.02 in |
| Section width | 175 mm | 6.89 in |
| Sidewall height | 140 mm | 5.51 in |
| Rim diameter | 457.2 mm | 18 in |
| Circumference | 2316.0 mm | 91.18 in |
| Revolutions per mile | 694.9 | |
| Aspect ratio | 80% | |
Compare 175/80R18 to similar sizes
Frequently asked questions
What is the overall diameter of a 175/80R18 tire?
A 175/80R18 tire has an overall diameter of 29.02 inches (737.2 mm).
How tall is a 175/80R18 tire?
The sidewall height is 140 mm (5.51 inches), and the overall diameter from the ground to the top of the tire is 29.02 inches.
How many revolutions per mile does a 175/80R18 tire make?
A 175/80R18 tire makes approximately 695 revolutions per mile. Your speedometer is calibrated to this number.
What rim size does a 175/80R18 tire fit?
A 175/80R18 tire is designed for a 18-inch rim (457.2 mm).
All dimensions calculated using standard ETRTO formulas. Always confirm fitment with your vehicle's door-placard and a qualified tire professional before purchasing.