182Best 255/30 R20 tires
23 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Continental Extreme Contact Sport 02 at 90/100.
26″
overall diameter
10″
section width
20″
rim diameter
775
revs per mile
Best 255/30 R20 summer tires
14182
279
379
478
578
775
874
972
1070
1171
12702 more rated tires in this size are listed on their brand pages.
More top-rated 255/30 R20 tires
6
190
284
384
486
579
662Best 255/30 R20 winter tires
2
180
277Best 255/30 R20 all-season tires
1
184Conversion
255/30 R20 in inches
| Overall diameter | 26″ |
| Section width | 10″ |
| Rim diameter | 20″ |
| Sidewall height | 77 mm |
| Circumference | 81.8″ |
| Revolutions per mile | 775 |
The closest flotation size is 33x11.50R20 — 26.8% taller and 14.5% wider. Compare them in the calculator.
Wheels
What rims fit 255/30 R20 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
7″
Ideal
8″
Maximum
9″
Rim diameter is fixed at 20″ — only the width varies. Estimated from the 10″ section width (70–90% rule).
Fitted from the factory on rims: 20x8.5, 20x9, 20x9.5, 20x10, 20x10.5.
Popular comparisons
Sizes often compared with 255/30 R20
Close alternatives — each opens in the tire size calculator.
Sidewall
255/30 R20 — what does it mean?
| Parameter | Meaning |
|---|---|
| 255 | The first number is the section width — 255 mm, or about 10 inches across the widest part of the tire. |
| 30 | The second number is the aspect ratio: sidewall height as a percentage of width. At 30%, the sidewall is about 77 mm tall. |
| R20 | R means radial construction, which nearly all modern tires use. The number is the rim diameter in inches — this tire fits a 20-inch wheel. |