188Best 245/55 R18 tires
32 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.
28.6″
overall diameter
9.6″
section width
18″
rim diameter
704.9
revs per mile
Best 245/55 R18 all-season tires
15188
286
386
484
585
684
783
880
984
1082
3 more rated tires in this size are listed on their brand pages.
More top-rated 245/55 R18 tires
7
187
285
384
483
593
6100
Best 245/55 R18 summer tires
6
193
286
381
492
570
674Best 245/55 R18 winter tires
4
191
280
378
475Conversion
245/55 R18 in inches
| Overall diameter | 28.6″ |
| Section width | 9.6″ |
| Rim diameter | 18″ |
| Sidewall height | 135 mm |
| Circumference | 89.9″ |
| Revolutions per mile | 704.9 |
The closest flotation size is 28x12.00R18 — 2.1% shorter and 24.4% wider. Compare them in the calculator.
Wheels
What rims fit 245/55 R18 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 18″ — only the width varies. Estimated from the 9.6″ section width (70–90% rule).
Fitted from the factory on rims: 18x7, 18x7.5, 18x8, 18x8.5.
Popular comparisons
Sizes often compared with 245/55 R18
Close alternatives — each opens in the tire size calculator.
Sidewall
245/55 R18 — 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. |
| 55 | The second number is the aspect ratio: sidewall height as a percentage of width. At 55%, the sidewall is about 135 mm tall. |
| R18 | R means radial construction, which nearly all modern tires use. The number is the rim diameter in inches — this tire fits a 18-inch wheel. |