186Best 215/45 R18 tires
54 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Goodyear Eagle Sport All-Season at 89/100.
25.6″
overall diameter
8.5″
section width
18″
rim diameter
787.3
revs per mile
Best 215/45 R18 summer tires
21186
284
389
482
582
682
789
881
979
1078
1178
12759 more rated tires in this size are listed on their brand pages.
Best 215/45 R18 all-season tires
15
189
288
386
486
584
684
782
884
980
1076
3 more rated tires in this size are listed on their brand pages.
More top-rated 215/45 R18 tires
14
188
288
383
484
583
683
786
885
980
10100
1188
12922 more rated tires in this size are listed on their brand pages.
Best 215/45 R18 winter tires
4
178
278
376
475Conversion
215/45 R18 in inches
| Overall diameter | 25.6″ |
| Section width | 8.5″ |
| Rim diameter | 18″ |
| Sidewall height | 97 mm |
| Circumference | 80.5″ |
| Revolutions per mile | 787.3 |
The closest flotation size is 28x12.00R18 — 9.3% taller and 41.8% wider. Compare them in the calculator.
Wheels
What rims fit 215/45 R18 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
6″
Ideal
7″
Maximum
7.5″
Rim diameter is fixed at 18″ — only the width varies. Estimated from the 8.5″ section width (70–90% rule).
Fitted from the factory on rims: 18x6.5, 18x7, 18x7.5, 18x8, 18x8.5, 18x10.
Popular comparisons
Sizes often compared with 215/45 R18
Close alternatives — each opens in the tire size calculator.
Sidewall
215/45 R18 — what does it mean?
| Parameter | Meaning |
|---|---|
| 215 | The first number is the section width — 215 mm, or about 8.5 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 97 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. |