183Best 275/55 R18 tires
1 rated tire available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Kumho Ecsta STX KL12 at 83/100.
29.9″
overall diameter
10.8″
section width
18″
rim diameter
674.3
revs per mile
Best 275/55 R18 summer tires
1183Conversion
275/55 R18 in inches
| Overall diameter | 29.9″ |
| Section width | 10.8″ |
| Rim diameter | 18″ |
| Sidewall height | 151 mm |
| Circumference | 94″ |
| Revolutions per mile | 674.3 |
The closest flotation size is 28x12.00R18 — 6.4% shorter and 10.8% wider. Compare them in the calculator.
Wheels
What rims fit 275/55 R18 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
7.5″
Ideal
8.5″
Maximum
9.5″
Rim diameter is fixed at 18″ — only the width varies. Estimated from the 10.8″ section width (70–90% rule).
Fitted from the factory on rims: 18x8, 18x8.5.
Popular comparisons
Sizes often compared with 275/55 R18
Close alternatives — each opens in the tire size calculator.
Sidewall
275/55 R18 — what does it mean?
| Parameter | Meaning |
|---|---|
| 275 | The first number is the section width — 275 mm, or about 10.8 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 151 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. |