180Best 235/40 R17 tires
12 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Toyo Proxes RA1 at 80/100.
24.4″
overall diameter
9.3″
section width
17″
rim diameter
826.5
revs per mile
Best 235/40 R17 summer tires
10180
279
377
480
574
665
774
865
971
1066More top-rated 235/40 R17 tires
2
266Conversion
235/40 R17 in inches
| Overall diameter | 24.4″ |
| Section width | 9.3″ |
| Rim diameter | 17″ |
| Sidewall height | 94 mm |
| Circumference | 76.7″ |
| Revolutions per mile | 826.5 |
The closest flotation size is 31x10.50R17 — 27% taller and 13.5% wider. Compare them in the calculator.
Wheels
What rims fit 235/40 R17 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
6.5″
Ideal
7.5″
Maximum
8.5″
Rim diameter is fixed at 17″ — only the width varies. Estimated from the 9.3″ section width (70–90% rule).
Fitted from the factory on rims: 17x5.5, 17x7.5, 17x8, 17x9.
Popular comparisons
Sizes often compared with 235/40 R17
Close alternatives — each opens in the tire size calculator.
Sidewall
235/40 R17 — what does it mean?
| Parameter | Meaning |
|---|---|
| 235 | The first number is the section width — 235 mm, or about 9.3 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 94 mm tall. |
| R17 | R means radial construction, which nearly all modern tires use. The number is the rim diameter in inches — this tire fits a 17-inch wheel. |