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255/55R20 tire size
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31.0" × 10.0"
255/55R20 ≈ 31.0x10.0R20 · approximate, new & unloaded
255/55R20 dimensions
| Measurement | Inches | mm |
|---|---|---|
| Overall diameter | 31.04 | 788 |
| Section width | 10.04 | 255 |
| Sidewall height | 5.52 | 140.2 |
| Wheel diameter | 20 | 508 |
| Circumference | 97.53 | 2477 |
| Revolutions per mile | 650 | |
Sizes close to 255/55R20
| Size | Diameter | Difference | Real speed at 60 mph indicated |
|---|---|---|---|
| 265/70R16 | 30.61" | -1.41% | 59.2 |
| 265/65R18 | 31.56" | +1.67% | 61.0 |
| 265/70R17 | 31.61" | +1.81% | 61.1 |
| 245/75R16 | 30.47" | -1.85% | 58.9 |
| 265/75R16 | 31.65" | +1.95% | 61.2 |
| 275/55R20 | 31.91" | +2.79% | 61.7 |
Diameter only - also check load index, speed rating, wheel width range and clearance with a tire professional.
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FAQ
How tall is a 255/55R20 tire in inches?
A 255/55R20 tire is about 31.0 inches tall (788 mm), 10.0 inches wide, with a 5.5-inch sidewall, for a 20-inch wheel.
What is 255/55R20 in inches (flotation size)?
Roughly 31.0x10.0R20.
How many revolutions per mile does a 255/55R20 tire make?
About 650 revolutions per mile (circumference 97.5 in), new and unloaded.
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