275/55R20 Tire Size
Dimensions of a 275/55R20 tire in inches and millimeters, with equivalent and plus sizes.
275/55R20 dimensions
A 275/55R20 tire is 275 mm wide with a sidewall that is 55% of the width (151 mm), mounted on a 20-inch rim. Its overall diameter is about 31.91 inches (810 mm), so it is roughly a 31.9-inch tall tire.
| Overall diameter | 31.91 in | 810 mm |
|---|---|---|
| Section width | 10.83 in | 275 mm |
| Sidewall height | 5.95 in | 151.2 mm |
| Rim diameter | 20 in | 508 mm |
| Circumference | 100.2 in | 2546 mm |
| Revolutions | 632 per mile | 393 per km |
Equivalent sizes on a 20-inch rim
These sizes stay within ±3% of the 275/55R20 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 |
|---|---|---|---|
| 255/60R20 | 32.05 in | 814 mm | +0.4% |
| 295/50R20 | 31.61 in | 803 mm | -0.9% |
| 265/55R20 | 31.48 in | 800 mm | -1.4% |
| 285/55R20 | 32.34 in | 822 mm | +1.4% |
| 265/60R20 | 32.52 in | 826 mm | +1.9% |
| 285/50R20 | 31.22 in | 793 mm | -2.2% |
| 295/55R20 | 32.78 in | 832 mm | +2.7% |
| 255/55R20 | 31.04 in | 788 mm | -2.7% |
Plus and minus sizes
Changing the rim size? These options on 19-, 21- and 22-inch rims keep the overall diameter within ±3%.
| Size | Diameter | mm | Difference |
|---|---|---|---|
| 275/60R19 | 31.99 in | 813 mm | +0.3% |
| 275/50R21 | 31.83 in | 808 mm | -0.3% |
| 305/45R21 | 31.81 in | 808 mm | -0.3% |
| 295/55R19 | 31.78 in | 807 mm | -0.4% |
| 275/45R22 | 31.74 in | 806 mm | -0.5% |
| 285/45R22 | 32.10 in | 815 mm | +0.6% |
| 305/55R19 | 32.21 in | 818 mm | +0.9% |
| 305/40R22 | 31.61 in | 803 mm | -1.0% |
| 285/50R21 | 32.22 in | 818 mm | +1.0% |
| 265/60R19 | 31.52 in | 801 mm | -1.2% |
Compare 275/55R20 with another size →
Frequently asked questions
How tall is a 275/55R20 tire?
About 31.91 inches (810 mm) in overall diameter.
How wide is a 275/55R20 tire?
The section width is 275 mm, about 10.8 inches.
What size can replace 275/55R20?
On the same rim, 255/60R20 is the closest size (+0.4% diameter). Use only sizes approved for your vehicle.
How many revolutions per mile does a 275/55R20 tire make?
About 632 revolutions per mile (393 per km).
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