275/65R18 Tire Size
Dimensions of a 275/65R18 tire in inches and millimeters, with equivalent and plus sizes.
275/65R18 dimensions
A 275/65R18 tire is 275 mm wide with a sidewall that is 65% of the width (179 mm), mounted on a 18-inch rim. Its overall diameter is about 32.07 inches (815 mm), so it is roughly a 32.1-inch tall tire.
| Overall diameter | 32.07 in | 815 mm |
|---|---|---|
| Section width | 10.83 in | 275 mm |
| Sidewall height | 7.04 in | 178.8 mm |
| Rim diameter | 18 in | 457 mm |
| Circumference | 100.8 in | 2559 mm |
| Revolutions | 629 per mile | 391 per km |
Equivalent sizes on a 18-inch rim
These sizes stay within ±3% of the 275/65R18 diameter on the same rim — the range most tire shops use. Not every size is made in every tire model, and only sizes approved for your vehicle (with the right load and speed rating) should be fitted.
| Size | Diameter | mm | Difference |
|---|---|---|---|
| 255/70R18 | 32.06 in | 814 mm | -0.1% |
| 295/60R18 | 31.94 in | 811 mm | -0.4% |
| 265/65R18 | 31.56 in | 802 mm | -1.6% |
| 285/65R18 | 32.59 in | 828 mm | +1.6% |
| 265/70R18 | 32.61 in | 828 mm | +1.7% |
| 285/60R18 | 31.46 in | 799 mm | -1.9% |
Plus and minus sizes
Changing the rim size? These options on 17-, 19- and 20-inch rims keep the overall diameter within ±3%.
| Size | Diameter | mm | Difference |
|---|---|---|---|
| 295/65R17 | 32.10 in | 815 mm | +0.1% |
| 305/50R20 | 32.01 in | 813 mm | -0.2% |
| 275/70R17 | 32.16 in | 817 mm | +0.3% |
| 275/60R19 | 31.99 in | 813 mm | -0.3% |
| 305/55R19 | 32.21 in | 818 mm | +0.4% |
| 275/55R20 | 31.91 in | 810 mm | -0.5% |
| 285/55R20 | 32.34 in | 822 mm | +0.8% |
| 295/55R19 | 31.78 in | 807 mm | -0.9% |
| 285/60R19 | 32.46 in | 825 mm | +1.2% |
| 265/60R20 | 32.52 in | 826 mm | +1.4% |
Compare 275/65R18 with another size →
Frequently asked questions
How tall is a 275/65R18 tire?
About 32.07 inches (815 mm) in overall diameter.
How wide is a 275/65R18 tire?
The section width is 275 mm, about 10.8 inches.
What size can replace 275/65R18?
On the same rim, 255/70R18 is the closest size (-0.1% diameter). Use only sizes approved for your vehicle.
How many revolutions per mile does a 275/65R18 tire make?
About 629 revolutions per mile (391 per km).
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