192Best 305/30 R20 tires
34 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Michelin Pilot Super Sport at 92/100.
27.2″
overall diameter
12″
section width
20″
rim diameter
741.3
revs per mile
Best 305/30 R20 summer tires
21192
291
389
484
583
682
783
879
979
1079
1177
12769 more rated tires in this size are listed on their brand pages.
More top-rated 305/30 R20 tires
10
188
290
484
584
686
780
879
977
1062Best 305/30 R20 all-season tires
2
186
280Best 305/30 R20 winter tires
1
180Conversion
305/30 R20 in inches
| Overall diameter | 27.2″ |
| Section width | 12″ |
| Rim diameter | 20″ |
| Sidewall height | 92 mm |
| Circumference | 85.5″ |
| Revolutions per mile | 741.3 |
The closest flotation size is 33x12.00R20 — 21.3% taller and 0.1% narrower. Compare them in the calculator.
Wheels
What rims fit 305/30 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: 20x10.5, 20x11, 20x11.5, 20x12.
Sidewall
305/30 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. |
| 30 | The second number is the aspect ratio: sidewall height as a percentage of width. At 30%, the sidewall is about 92 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. |