193Best 245/45 R20 tires
129 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Toyo Extensa HP II at 93/100.
28.7″
overall diameter
9.6″
section width
20″
rim diameter
703.2
revs per mile
Best 245/45 R20 summer tires
44193
289
389
486
584
684
789
882
983
1082
1189
128732 more rated tires in this size are listed on their brand pages.
Best 245/45 R20 all-season tires
41
189
288
388
490
586
686
785
884
984
1085
1185
128229 more rated tires in this size are listed on their brand pages.
More top-rated 245/45 R20 tires
34
192
292
388
490
588
690
788
888
987
1093
1184
128522 more rated tires in this size are listed on their brand pages.
Best 245/45 R20 winter tires
10
185
281
380
478
578
677
775
875
975
1073Conversion
245/45 R20 in inches
| Overall diameter | 28.7″ |
| Section width | 9.6″ |
| Rim diameter | 20″ |
| Sidewall height | 110 mm |
| Circumference | 90.1″ |
| Revolutions per mile | 703.2 |
The closest flotation size is 33x11.50R20 — 15.1% taller and 19.2% wider. Compare them in the calculator.
Wheels
What rims fit 245/45 R20 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
7″
Ideal
7.5″
Maximum
8.5″
Rim diameter is fixed at 20″ — only the width varies. Estimated from the 9.6″ section width (70–90% rule).
Fitted from the factory on rims: 20x7.5, 20x8, 20x8.5, 20x9, 20x9.5, 20x11.
Popular comparisons
Sizes often compared with 245/45 R20
Close alternatives — each opens in the tire size calculator.
Sidewall
245/45 R20 — what does it mean?
| Parameter | Meaning |
|---|---|
| 245 | The first number is the section width — 245 mm, or about 9.6 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 110 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. |