191Best 315/30 R20 tires
9 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Michelin Pilot Sport Cup 2 R at 91/100.
27.4″
overall diameter
12.4″
section width
20″
rim diameter
735
revs per mile
Best 315/30 R20 summer tires
6191
284
383
474
574
671More top-rated 315/30 R20 tires
3
266
362Conversion
315/30 R20 in inches
| Overall diameter | 27.4″ |
| Section width | 12.4″ |
| Rim diameter | 20″ |
| Sidewall height | 95 mm |
| Circumference | 86.2″ |
| Revolutions per mile | 735 |
The closest flotation size is 33x12.50R20 — 20.3% taller and 0.8% wider. Compare them in the calculator.
Wheels
What rims fit 315/30 R20 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
8.5″
Ideal
10″
Maximum
11″
Rim diameter is fixed at 20″ — only the width varies. Estimated from the 12.4″ section width (70–90% rule).
Fitted from the factory on rims: 20x10, 20x11, 20x11.5.
Sidewall
315/30 R20 — what does it mean?
| Parameter | Meaning |
|---|---|
| 315 | The first number is the section width — 315 mm, or about 12.4 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 95 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. |