187Best 245/70 R18 tires
3 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the BFGoodrich All Terrain T/A KO3 at 87/100.
31.5″
overall diameter
9.6″
section width
18″
rim diameter
640.2
revs per mile
Best 245/70 R18 all-terrain tires
2187
291Best 245/70 R18 summer tires
1
187Conversion
245/70 R18 in inches
| Overall diameter | 31.5″ |
| Section width | 9.6″ |
| Rim diameter | 18″ |
| Sidewall height | 172 mm |
| Circumference | 99″ |
| Revolutions per mile | 640.2 |
The closest flotation size is 33x10.50R18 — 4.7% taller and 8.9% wider. Compare them in the calculator.
Wheels
What rims fit 245/70 R18 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
7″
Ideal
7.5″
Maximum
8.5″
Rim diameter is fixed at 18″ — only the width varies. Estimated from the 9.6″ section width (70–90% rule).
Fitted from the factory on rims: 18x7, 18x7.5.
Sidewall
245/70 R18 — what does it mean?
| Parameter | Meaning |
|---|---|
| 245 | The first number is the section width — 245 mm, or about 9.6 inches across the widest part of the tire. |
| 70 | The second number is the aspect ratio: sidewall height as a percentage of width. At 70%, the sidewall is about 172 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. |