190Best 235/80 R18 tires
4 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Goodyear Wrangler Duratrac RT at 90/100.
32.8″
overall diameter
9.3″
section width
18″
rim diameter
614.8
revs per mile
More top-rated 235/80 R18 tires
2190
296Best 235/80 R18 all-terrain tires
2
187
283Conversion
235/80 R18 in inches
| Overall diameter | 32.8″ |
| Section width | 9.3″ |
| Rim diameter | 18″ |
| Sidewall height | 188 mm |
| Circumference | 103.1″ |
| Revolutions per mile | 614.8 |
The closest flotation size is 33x10.50R18 — 0.6% taller and 13.5% wider. Compare them in the calculator.
Wheels
What rims fit 235/80 R18 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
6.5″
Ideal
7.5″
Maximum
8.5″
Rim diameter is fixed at 18″ — only the width varies. Estimated from the 9.3″ section width (70–90% rule).
Sidewall
235/80 R18 — what does it mean?
| Parameter | Meaning |
|---|---|
| 235 | The first number is the section width — 235 mm, or about 9.3 inches across the widest part of the tire. |
| 80 | The second number is the aspect ratio: sidewall height as a percentage of width. At 80%, the sidewall is about 188 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. |