Best 325/30R18 tires
No tire in this size has a score yet — too few owner reviews and tests. 2 vehicle models use it from the factory. See the nearest sizes with rated tires.
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Nearest sizes with rated tires
Within 3% of the overall diameter, on the same rim first. Check the sizes approved for your vehicle before you switch.
325/30R18 in inches
| Overall diameter | 25.7″ |
| Section width | 12.8″ |
| Rim diameter | 18″ |
| Sidewall height | 98 mm |
| Circumference | 80.7″ |
| Revolutions per mile | 785.4 |
Revolutions per mile: how many times the tire turns in one mile, the count your speedometer is calibrated to.
Compare 325/30R18 with another size in the tire size calculator
What rims fit 325/30R18 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
The rim diameter is fixed at 18″; only the width can change. Rims are usually 70–90% as wide as the tire’s 12.8″ section width.
Some factory fitments sit outside that range: 18x12. Check the rim width approved for your car before you buy.
Cars that use 325/30R18
Fitted from the factory on at least one trim. Models with the most trims and years in this size come first.
325/30R18 — what does it mean?
| Parameter | Meaning |
|---|---|
| 325 | The first number is the section width — 325 mm, or about 12.8 inches across the widest part of the tire. |
| 30 | The second number is the aspect ratio: sidewall height as a percentage of width. At 30%, the sidewall is about 98 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. |