184Best 235/45 R20 tires
30 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Goodyear Assurance Maxlife2 at 92/100.
28.3″
overall diameter
9.3″
section width
20″
rim diameter
712
revs per mile
Best 235/45 R20 summer tires
9184
283
387
477
574
673
770
870
967Best 235/45 R20 all-season tires
9
188
280
377
478
576
872
949More top-rated 235/45 R20 tires
7
192
288
393
484
677
Best 235/45 R20 winter tires
5
188
278
475
573Conversion
235/45 R20 in inches
| Overall diameter | 28.3″ |
| Section width | 9.3″ |
| Rim diameter | 20″ |
| Sidewall height | 106 mm |
| Circumference | 89″ |
| Revolutions per mile | 712 |
The closest flotation size is 33x11.50R20 — 16.5% taller and 24.3% wider. Compare them in the calculator.
Wheels
What rims fit 235/45 R20 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
6.5″
Ideal
7.5″
Maximum
8.5″
Rim diameter is fixed at 20″ — only the width varies. Estimated from the 9.3″ section width (70–90% rule).
Fitted from the factory on rims: 20x7.5, 20x8, 20x8.5, 20x9, 20x9.5.
Popular comparisons
Sizes often compared with 235/45 R20
Close alternatives — each opens in the tire size calculator.
Sidewall
235/45 R20 — what does it mean?
| Parameter | Meaning |
|---|---|
| 235 | The first number is the section width — 235 mm, or about 9.3 inches across the widest part of the tire. |
| 45 | The second number is the aspect ratio: sidewall height as a percentage of width. At 45%, the sidewall is about 106 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. |