255/75R17
A 255/75R17 tire is 32.06 inches tall and 10.0 inches wide, with a 7.53-inch sidewall, mounted on a 17-inch wheel.
Overall diameter
32.06″
814 mm
Sidewall height
7.53″
191.3 mm
Tread width
255 mm
10.0″
Circumference
100.72″
8.4 ft
Revs per mile
629
391 per km
Wheel diameter
17″
aspect ratio 75%
Cross-section
- Overall diameter
- 32.06″
- Sidewall (each side)
- 7.53″
- Wheel
- 17″
255/75R17 in inches and millimeters
Every dimension of a 255/75R17, converted both ways. Calculated from the size code, accurate to about 1%.
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter (height) | 32.06″ | 814 mm |
| Tread width | 10.0″ | 255 mm |
| Sidewall height | 7.53″ | 191.3 mm |
| Wheel diameter | 17″ | 432 mm |
| Circumference | 100.72″ | 2558 mm |
Nominal dimensions from the size code. A real tire varies by a few millimeters between manufacturers, and a loaded tire sits slightly shorter than its free diameter.
255/75R17 compared with other sizes
All 28 practical swaps involving 255/75R17 — diameter change, speedometer impact and a fit verdict for each.
255/75R17 → 265/70R17
265/70R17
Diameter +1.4% · Fitment not determined
255/75R17 → 265/75R16
265/75R16
Diameter +1.3% · Fitment not determined
255/75R17 → 285/75R16
285/75R16
Diameter −2.4% · Fitment not determined
255/75R17 → 235/80R17
235/80R17
Diameter +0.8% · Fitment not determined
255/75R17 → 245/70R17
245/70R17
Diameter +5.1% · Fitment not determined
255/75R17 → 245/75R17
245/75R17
Diameter +1.9% · Fitment not determined
255/75R17 → 255/70R17
255/70R17
Diameter +3.2% · Fitment not determined
275/70R17 → 255/75R17
275/70R17
Diameter +0.3% · Fitment not determined
235/80R17 → 255/75R17
235/80R17
Diameter −0.8% · Fitment not determined
265/70R17 → 255/75R17
265/70R17
Diameter −1.4% · Fitment not determined
245/75R17 → 255/75R17
245/75R17
Diameter −1.8% · Fitment not determined
255/70R17 → 255/75R17
255/70R17
Diameter −3.1% · Fitment not determined
285/70R17 → 255/75R17
285/70R17
Diameter +2.0% · Fitment not determined
275/65R17 → 255/75R17
275/65R17
Diameter −3.1% · Fitment not determined
255/70R18 → 255/75R17
255/70R18
Diameter −0.0% · Fitment not determined
265/65R17 → 255/75R17
265/65R17
Diameter −4.7% · Fitment not determined
245/70R17 → 255/75R17
245/70R17
Diameter −4.9% · Fitment not determined
275/65R18 → 255/75R17
275/65R18
Diameter +0.0% · Fitment not determined
265/75R16 → 255/75R17
265/75R16
Diameter −1.3% · Fitment not determined
265/65R18 → 255/75R17
265/65R18
Diameter −1.5% · Fitment not determined
285/65R18 → 255/75R17
285/65R18
Diameter +1.6% · Fitment not determined
255/75R17 → 265/65R17
265/65R17
Diameter +4.9% · Fitment not determined
255/75R17 → 275/65R17
275/65R17
Diameter +3.2% · Fitment not determined
255/75R17 → 275/70R17
275/70R17
Diameter −0.3% · Fitment not determined
255/75R17 → 285/70R17
285/70R17
Diameter −2.0% · Fitment not determined
255/75R17 → 255/70R18
255/70R18
Diameter +0.0% · Fitment not determined
255/75R17 → 275/65R18
275/65R18
Diameter −0.0% · Fitment not determined
255/75R17 → 225/45R17
225/45R17
Diameter +28.4% · Fitment not determined
Common questions
- What is 255/75R17 in inches?
- A 255/75R17 tire is 32.06 inches tall and 10.0 inches wide, with a 7.53-inch sidewall, mounted on a 17-inch wheel. In metric that is 814 mm tall and 255 mm wide. The circumference is 100.72 inches.
- How tall is a 255/75R17 tire?
- 32.06 inches, or 814 mm. That is the overall diameter, wheel included. It turns about 629 times per mile, which is what your speedometer counts.
- What do the numbers in 255/75R17 mean?
- 255 is the tread width in millimeters, 75 is the aspect ratio — the sidewall height as a percentage of the tread width — and 17 is the wheel diameter in inches. So the sidewall is 255 × 75% = 191.3 mm tall.