195Best 255/55 R20 tires
79 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Michelin Defender LTX M/S at 95/100.
31″
overall diameter
10″
section width
20″
rim diameter
649.7
revs per mile
Best 255/55 R20 all-season tires
26195
292
389
491
588
688
786
890
991
1086
1191
129414 more rated tires in this size are listed on their brand pages.
More top-rated 255/55 R20 tires
26
192
293
388
496
590
688
788
887
984
1089
1187
128414 more rated tires in this size are listed on their brand pages.
Best 255/55 R20 summer tires
12
187
284
383
482
587
681
783
876
976
1075
1166
1273Best 255/55 R20 all-terrain tires
9
193
289
385
483
591
686
793
969Best 255/55 R20 winter tires
6
192
285
388
481
578
688Conversion
255/55 R20 in inches
| Overall diameter | 31″ |
| Section width | 10″ |
| Rim diameter | 20″ |
| Sidewall height | 140 mm |
| Circumference | 97.5″ |
| Revolutions per mile | 649.7 |
The closest flotation size is 33x11.50R20 — 6.3% taller and 14.5% wider. Compare them in the calculator.
Wheels
What rims fit 255/55 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: 20x7.5, 20x8, 20x8.5, 20x9.
Popular comparisons
Sizes often compared with 255/55 R20
Close alternatives — each opens in the tire size calculator.
Sidewall
255/55 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. |
| 55 | The second number is the aspect ratio: sidewall height as a percentage of width. At 55%, the sidewall is about 140 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. |