275/70R18 Tire Size
Dimensions of a 275/70R18 tire in inches and millimeters, with equivalent and plus sizes.
275/70R18 dimensions
A 275/70R18 tire is 275 mm wide with a sidewall that is 70% of the width (192 mm), mounted on a 18-inch rim. Its overall diameter is about 33.16 inches (842 mm), so it is roughly a 33.2-inch tall tire.
| Overall diameter | 33.16 in | 842 mm |
|---|---|---|
| Section width | 10.83 in | 275 mm |
| Sidewall height | 7.58 in | 192.5 mm |
| Rim diameter | 18 in | 457 mm |
| Circumference | 104.2 in | 2646 mm |
| Revolutions | 608 per mile | 378 per km |
Equivalent sizes on a 18-inch rim
These sizes stay within ±3% of the 275/70R18 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 |
|---|---|---|---|
| 295/65R18 | 33.10 in | 841 mm | -0.2% |
| 255/75R18 | 33.06 in | 840 mm | -0.3% |
| 265/75R18 | 33.65 in | 855 mm | +1.5% |
| 265/70R18 | 32.61 in | 828 mm | -1.7% |
| 285/70R18 | 33.71 in | 856 mm | +1.7% |
| 285/65R18 | 32.59 in | 828 mm | -1.7% |
| 255/80R18 | 34.06 in | 865 mm | +2.7% |
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 |
|---|---|---|---|
| 305/55R20 | 33.21 in | 844 mm | +0.2% |
| 275/75R17 | 33.24 in | 844 mm | +0.2% |
| 275/65R19 | 33.07 in | 840 mm | -0.2% |
| 295/70R17 | 33.26 in | 845 mm | +0.3% |
| 275/60R20 | 32.99 in | 838 mm | -0.5% |
| 295/60R19 | 32.94 in | 837 mm | -0.7% |
| 305/60R19 | 33.41 in | 849 mm | +0.8% |
| 285/60R20 | 33.46 in | 850 mm | +0.9% |
| 295/55R20 | 32.78 in | 832 mm | -1.2% |
| 265/65R20 | 33.56 in | 852 mm | +1.2% |
Compare 275/70R18 with another size →
Frequently asked questions
How tall is a 275/70R18 tire?
About 33.16 inches (842 mm) in overall diameter.
How wide is a 275/70R18 tire?
The section width is 275 mm, about 10.8 inches.
What size can replace 275/70R18?
On the same rim, 295/65R18 is the closest size (-0.2% diameter). Use only sizes approved for your vehicle.
How many revolutions per mile does a 275/70R18 tire make?
About 608 revolutions per mile (378 per km).
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