195Best 255/65 R18 tires
60 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Michelin Defender LTX M/S at 95/100.
31.1″
overall diameter
10″
section width
18″
rim diameter
649.5
revs per mile
Best 255/65 R18 all-season tires
32195
292
389
491
588
690
790
885
993
1086
1194
128620 more rated tires in this size are listed on their brand pages.
More top-rated 255/65 R18 tires
15
192
293
388
490
587
689
793
888
982
1199
12803 more rated tires in this size are listed on their brand pages.
Best 255/65 R18 winter tires
5
192
291
388
488
Best 255/65 R18 all-terrain tires
4
192
289
390
469Best 255/65 R18 summer tires
4
187
283
387
483Conversion
255/65 R18 in inches
| Overall diameter | 31.1″ |
| Section width | 10″ |
| Rim diameter | 18″ |
| Sidewall height | 166 mm |
| Circumference | 97.6″ |
| Revolutions per mile | 649.5 |
The closest flotation size is 33x10.50R18 — 6.3% taller and 4.6% wider. Compare them in the calculator.
Wheels
What rims fit 255/65 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, 18x7.5, 18x8.
Popular comparisons
Sizes often compared with 255/65 R18
Close alternatives — each opens in the tire size calculator.
Sidewall
255/65 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. |
| 65 | The second number is the aspect ratio: sidewall height as a percentage of width. At 65%, the sidewall is about 166 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. |