193Best 225/55 R18 tires
104 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Cooper CS5 Grand Touring at 93/100.
27.7″
overall diameter
8.9″
section width
18″
rim diameter
726.9
revs per mile
Best 225/55 R18 all-season tires
48193
291
393
489
589
691
788
888
990
1091
1190
128436 more rated tires in this size are listed on their brand pages.
More top-rated 225/55 R18 tires
20
192
293
388
496
590
688
786
887
987
1093
1188
12828 more rated tires in this size are listed on their brand pages.
Best 225/55 R18 winter tires
19
192
291
488
583
684
781
878
998
1080
1188
12867 more rated tires in this size are listed on their brand pages.
Best 225/55 R18 summer tires
12
190
283
387
481
583
675
766
873
970
1062
1165
1267Best 225/55 R18 all-terrain tires
5
189
285
383
483
569Conversion
225/55 R18 in inches
| Overall diameter | 27.7″ |
| Section width | 8.9″ |
| Rim diameter | 18″ |
| Sidewall height | 124 mm |
| Circumference | 87.2″ |
| Revolutions per mile | 726.9 |
The closest flotation size is 28x12.00R18 — 0.9% taller and 35.5% wider. Compare them in the calculator.
Wheels
What rims fit 225/55 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
8″
Rim diameter is fixed at 18″ — only the width varies. Estimated from the 8.9″ section width (70–90% rule).
Fitted from the factory on rims: 18x6, 18x6.5, 18x7, 18x7.5, 18x8.
Popular comparisons
Sizes often compared with 225/55 R18
Close alternatives — each opens in the tire size calculator.
Sidewall
225/55 R18 — what does it mean?
| Parameter | Meaning |
|---|---|
| 225 | The first number is the section width — 225 mm, or about 8.9 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 124 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. |