Best 185/45 R15 tires
We don't have rated tires listed in this size yet — the conversion, rim fitment and comparisons below still apply.
21.6″
overall diameter
7.3″
section width
15″
rim diameter
935.7
revs per mile
Conversion
185/45 R15 in inches
| Overall diameter | 21.6″ |
| Section width | 7.3″ |
| Rim diameter | 15″ |
| Sidewall height | 83 mm |
| Circumference | 67.7″ |
| Revolutions per mile | 935.7 |
The closest flotation size is 26x10R15 — 20.6% taller and 37.3% wider. Compare them in the calculator.
Wheels
What rims fit 185/45 R15 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
5″
Ideal
6″
Maximum
6.5″
Rim diameter is fixed at 15″ — only the width varies. Estimated from the 7.3″ section width (70–90% rule).
Fitted from the factory on rims: 15x5.5, 15x6.
Sidewall
185/45 R15 — what does it mean?
| Parameter | Meaning |
|---|---|
| 185 | The first number is the section width — 185 mm, or about 7.3 inches across the widest part of the tire. |
| 45 | The second number is the aspect ratio: sidewall height as a percentage of width. At 45%, the sidewall is about 83 mm tall. |
| R15 | R means radial construction, which nearly all modern tires use. The number is the rim diameter in inches — this tire fits a 15-inch wheel. |