181Best 315/20 R30 tires
1 rated tire available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Lexani LX Thirty at 81/100.
35″
overall diameter
12.4″
section width
30″
rim diameter
576.9
revs per mile
Best 315/20 R30 summer tires
1181Conversion
315/20 R30 in inches
| Overall diameter | 35″ |
| Section width | 12.4″ |
| Rim diameter | 30″ |
| Sidewall height | 63 mm |
| Circumference | 109.8″ |
| Revolutions per mile | 576.9 |
Wheels
What rims fit 315/20 R30 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 30″ — only the width varies. Estimated from the 12.4″ section width (70–90% rule).
Sidewall
315/20 R30 — 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. |
| 20 | The second number is the aspect ratio: sidewall height as a percentage of width. At 20%, the sidewall is about 63 mm tall. |
| R30 | R means radial construction, which nearly all modern tires use. The number is the rim diameter in inches — this tire fits a 30-inch wheel. |