194Best 255/70 R18 tires
66 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Cooper Discoverer AT3 4S at 94/100.
32.1″
overall diameter
10″
section width
18″
rim diameter
629.2
revs per mile
Best 255/70 R18 all-terrain tires
33194
293
393
492
593
691
793
891
989
1090
1191
129021 more rated tires in this size are listed on their brand pages.
Best 255/70 R18 all-season tires
21
192
291
391
485
586
691
786
888
982
1082
1181
12789 more rated tires in this size are listed on their brand pages.
More top-rated 255/70 R18 tires
11
191
290
396
489
592
696
786
999
1080
1183Best 255/70 R18 winter tires
1
188Conversion
255/70 R18 in inches
| Overall diameter | 32.1″ |
| Section width | 10″ |
| Rim diameter | 18″ |
| Sidewall height | 179 mm |
| Circumference | 100.7″ |
| Revolutions per mile | 629.2 |
The closest flotation size is 33x10.50R18 — 2.9% taller and 4.6% wider. Compare them in the calculator.
Wheels
What rims fit 255/70 R18 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
7″
Ideal
8″
Maximum
9″
Rim diameter is fixed at 18″ — only the width varies. Estimated from the 10″ section width (70–90% rule).
Fitted from the factory on rims: 18x7.5, 18x8, 18x8.5.
Popular comparisons
Sizes often compared with 255/70 R18
Close alternatives — each opens in the tire size calculator.
Sidewall
255/70 R18 — what does it mean?
| Parameter | Meaning |
|---|---|
| 255 | The first number is the section width — 255 mm, or about 10 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 179 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. |