184Best 285/45 R20 tires
22 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Michelin Pilot Sport All Season 4 at 88/100.
30.1″
overall diameter
11.2″
section width
20″
rim diameter
670.1
revs per mile
Best 285/45 R20 summer tires
8184
287
381
477
674
773
870Best 285/45 R20 all-season tires
7
188
286
390
480
674
762More top-rated 285/45 R20 tires
5
188
284
384
486
577Best 285/45 R20 winter tires
2
181
278Conversion
285/45 R20 in inches
| Overall diameter | 30.1″ |
| Section width | 11.2″ |
| Rim diameter | 20″ |
| Sidewall height | 128 mm |
| Circumference | 94.6″ |
| Revolutions per mile | 670.1 |
The closest flotation size is 33x11.50R20 — 9.6% taller and 2.5% wider. Compare them in the calculator.
Wheels
What rims fit 285/45 R20 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
8″
Ideal
9″
Maximum
10″
Rim diameter is fixed at 20″ — only the width varies. Estimated from the 11.2″ section width (70–90% rule).
Fitted from the factory on rims: 20x9, 20x9.5, 20x10.
Popular comparisons
Sizes often compared with 285/45 R20
Close alternatives — each opens in the tire size calculator.
Sidewall
285/45 R20 — what does it mean?
| Parameter | Meaning |
|---|---|
| 285 | The first number is the section width — 285 mm, or about 11.2 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 128 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. |