Best 265/55 R18 tires
We don't have rated tires listed in this size yet — the conversion, rim fitment and comparisons below still apply.
29.5″
overall diameter
10.4″
section width
18″
rim diameter
684.2
revs per mile
Conversion
265/55 R18 in inches
| Overall diameter | 29.5″ |
| Section width | 10.4″ |
| Rim diameter | 18″ |
| Sidewall height | 146 mm |
| Circumference | 92.6″ |
| Revolutions per mile | 684.2 |
The closest flotation size is 28x12.00R18 — 5% shorter and 15% wider. Compare them in the calculator.
Wheels
What rims fit 265/55 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 10.4″ section width (70–90% rule).
Fitted from the factory on rims: 18x7.5, 18x8, 18x8.5, 18x9.
Sidewall
265/55 R18 — what does it mean?
| Parameter | Meaning |
|---|---|
| 265 | The first number is the section width — 265 mm, or about 10.4 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 146 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. |