315/70R17
A 315/70R17 tire is 34.36 inches tall and 12.4 inches wide, with a 8.68-inch sidewall, mounted on a 17-inch wheel.
Overall diameter
34.36″
873 mm
Sidewall height
8.68″
220.5 mm
Tread width
315 mm
12.4″
Circumference
107.95″
9.0 ft
Revs per mile
587
365 per km
Wheel diameter
17″
aspect ratio 70%
Cross-section
- Overall diameter
- 34.36″
- Sidewall (each side)
- 8.68″
- Wheel
- 17″
315/70R17 in inches and millimeters
Every dimension of a 315/70R17, converted both ways. Calculated from the size code, accurate to about 1%.
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter (height) | 34.36″ | 873 mm |
| Tread width | 12.4″ | 315 mm |
| Sidewall height | 8.68″ | 220.5 mm |
| Wheel diameter | 17″ | 432 mm |
| Circumference | 107.95″ | 2742 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.
315/70R17 compared with other sizes
All 13 practical swaps involving 315/70R17 — diameter change, speedometer impact and a fit verdict for each.
315/70R17 → 285/70R17
285/70R17
Diameter +5.1% · Fitment not determined
315/70R17 → 305/65R17
305/65R17
Diameter +5.4% · Fitment not determined
315/70R17 → 305/70R17
305/70R17
Diameter +1.6% · Fitment not determined
305/70R17 → 315/70R17
305/70R17
Diameter −1.6% · Fitment not determined
285/70R17 → 315/70R17
285/70R17
Diameter −4.8% · Fitment not determined
305/65R17 → 315/70R17
305/65R17
Diameter −5.1% · Fitment not determined
295/70R18 → 315/70R17
295/70R18
Diameter −0.3% · Fitment not determined
285/70R18 → 315/70R17
285/70R18
Diameter −1.9% · Fitment not determined
275/70R18 → 315/70R17
275/70R18
Diameter −3.5% · Fitment not determined
285/75R16 → 315/70R17
285/75R16
Diameter −4.5% · Fitment not determined
285/65R18 → 315/70R17
285/65R18
Diameter −5.2% · Fitment not determined
315/70R17 → 295/70R18
295/70R18
Diameter +0.3% · Fitment not determined
315/70R17 → 225/45R17
225/45R17
Diameter +37.6% · Fitment not determined
Common questions
- What is 315/70R17 in inches?
- A 315/70R17 tire is 34.36 inches tall and 12.4 inches wide, with a 8.68-inch sidewall, mounted on a 17-inch wheel. In metric that is 873 mm tall and 315 mm wide. The circumference is 107.95 inches.
- How tall is a 315/70R17 tire?
- 34.36 inches, or 873 mm. That is the overall diameter, wheel included. It turns about 587 times per mile, which is what your speedometer counts.
- What do the numbers in 315/70R17 mean?
- 315 is the tread width in millimeters, 70 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 315 × 70% = 220.5 mm tall.