Best 255/40 R23 tires
We don't have rated tires listed in this size yet — the conversion, rim fitment and comparisons below still apply.
31″
overall diameter
10″
section width
23″
rim diameter
649.9
revs per mile
Conversion
255/40 R23 in inches
| Overall diameter | 31″ |
| Section width | 10″ |
| Rim diameter | 23″ |
| Sidewall height | 102 mm |
| Circumference | 97.5″ |
| Revolutions per mile | 649.9 |
Wheels
What rims fit 255/40 R23 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 23″ — only the width varies. Estimated from the 10″ section width (70–90% rule).
Fitted from the factory on rims: 23x9.
Sidewall
255/40 R23 — 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. |
| 40 | The second number is the aspect ratio: sidewall height as a percentage of width. At 40%, the sidewall is about 102 mm tall. |
| R23 | R means radial construction, which nearly all modern tires use. The number is the rim diameter in inches — this tire fits a 23-inch wheel. |