193Best 305/55 R20 tires
45 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Falken WildPeak A/T3W at 93/100.
33.2″
overall diameter
12″
section width
20″
rim diameter
607.3
revs per mile
Best 305/55 R20 all-terrain tires
32193
293
393
492
593
693
789
891
990
1090
1188
128820 more rated tires in this size are listed on their brand pages.
Best 305/55 R20 mud-terrain tires
7
193
290
390
492
580
More top-rated 305/55 R20 tires
6
191
290
390
490
596
686Conversion
305/55 R20 in inches
| Overall diameter | 33.2″ |
| Section width | 12″ |
| Rim diameter | 20″ |
| Sidewall height | 168 mm |
| Circumference | 104.3″ |
| Revolutions per mile | 607.3 |
The closest flotation size is 33x12.00R20 — 0.6% shorter and 0.1% narrower. Compare them in the calculator.
Wheels
What rims fit 305/55 R20 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
8.5″
Ideal
9.5″
Maximum
11″
Rim diameter is fixed at 20″ — only the width varies. Estimated from the 12″ section width (70–90% rule).
Fitted from the factory on rims: 20x9.
Popular comparisons
Sizes often compared with 305/55 R20
Close alternatives — each opens in the tire size calculator.
Sidewall
305/55 R20 — what does it mean?
| Parameter | Meaning |
|---|---|
| 305 | The first number is the section width — 305 mm, or about 12 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 168 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. |