193Best 305/50 R20 tires
19 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.
32″
overall diameter
12″
section width
20″
rim diameter
630.1
revs per mile
Best 305/50 R20 all-terrain tires
9193
292
389
488
587
686
783
883
968Best 305/50 R20 all-season tires
4
195
290
More top-rated 305/50 R20 tires
4
191
290
396
483Best 305/50 R20 summer tires
2
189
283Conversion
305/50 R20 in inches
| Overall diameter | 32″ |
| Section width | 12″ |
| Rim diameter | 20″ |
| Sidewall height | 153 mm |
| Circumference | 100.6″ |
| Revolutions per mile | 630.1 |
The closest flotation size is 33x12.00R20 — 3.1% taller and 0.1% narrower. Compare them in the calculator.
Wheels
What rims fit 305/50 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).
Popular comparisons
Sizes often compared with 305/50 R20
Close alternatives — each opens in the tire size calculator.
Sidewall
305/50 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. |
| 50 | The second number is the aspect ratio: sidewall height as a percentage of width. At 50%, the sidewall is about 153 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. |