193Best 255/40 R17 tires
57 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Michelin Pilot Sport PS2 at 93/100.
25″
overall diameter
10″
section width
17″
rim diameter
805.7
revs per mile
Best 255/40 R17 summer tires
40193
289
384
484
583
683
782
882
982
1081
1179
127928 more rated tires in this size are listed on their brand pages.
Best 255/40 R17 all-season tires
9
188
286
386
484
584
682
778
869
959More top-rated 255/40 R17 tires
7
188
290
383
493
580
766Best 255/40 R17 winter tires
1
180Conversion
255/40 R17 in inches
| Overall diameter | 25″ |
| Section width | 10″ |
| Rim diameter | 17″ |
| Sidewall height | 102 mm |
| Circumference | 78.6″ |
| Revolutions per mile | 805.7 |
The closest flotation size is 31x10.50R17 — 23.8% taller and 4.6% wider. Compare them in the calculator.
Wheels
What rims fit 255/40 R17 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 17″ — only the width varies. Estimated from the 10″ section width (70–90% rule).
Fitted from the factory on rims: 17x8, 17x8.5, 17x9, 17x9.5.
Popular comparisons
Sizes often compared with 255/40 R17
Close alternatives — each opens in the tire size calculator.
Sidewall
255/40 R17 — 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. |
| 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. |