Best 345/35R18 tires
No tire in this size has a score yet — too few owner reviews and tests. 1 vehicle model uses it from the factory. See the nearest sizes with rated tires.
TireWheelGuide may earn a commission from purchases made through these links.
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.
345/35R18 in inches
| Overall diameter | 27.5″ |
| Section width | 13.6″ |
| Rim diameter | 18″ |
| Sidewall height | 121 mm |
| Circumference | 86.4″ |
| Revolutions per mile | 733.2 |
Revolutions per mile: how many times the tire turns in one mile, the count your speedometer is calibrated to.
The closest flotation size is 28x12.00R18 — 1.8% taller and 11.7% narrower. Compare them in the calculator.
What rims fit 345/35R18 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 13.6″ section width.
Some factory fitments sit outside that range: 18x14. Check the rim width approved for your car before you buy.
Cars that use 345/35R18
Fitted from the factory on at least one trim. Models with the most trims and years in this size come first.
345/35R18 — what does it mean?
| Parameter | Meaning |
|---|---|
| 345 | The first number is the section width — 345 mm, or about 13.6 inches across the widest part of the tire. |
| 35 | The second number is the aspect ratio: sidewall height as a percentage of width. At 35%, the sidewall is about 121 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. |