315/70R17 Tire Size in Inches and Millimeters
Complete dimensional breakdown in inches and millimeters, approved wheel rim widths, vehicle fitments, speedometer error tables, and safe plus-sizing alternatives.
315/70R17 in Inches
315/70R17 converts to 34.36 inches tall and 12.4 inches wide, on a17 inch wheel. The sidewall accounts for 8.68 inches of that height, top and bottom.
- Overall height
- 34.36" (872.7 mm)
- Tread width
- 12.4" (315 mm)
- Sidewall height
- 8.68" (220.5 mm)
- Wheel diameter
- 17" (431.8 mm)
This size is also written 315/70/17 and 315-70-17. All three refer to the same tire: 315 mm wide, a sidewall 70% of that width, on a 17 inch rim.
315/70R17 Technical Dimension Table
Standardized measurements computed according to ETRTO & ISO 4000-1 passenger and commercial tire design formulas.
| Specification Property | Imperial (Inches / Miles) | Metric (Millimeters / Kilometers) |
|---|---|---|
| Overall Rolling Diameter | 34.36 in | 872.7 mm |
| Section Width (Cross-section) | 12.4 in | 315 mm |
| Sidewall Cushion Height | 8.68 in | 220.5 mm |
| Circumference (Rolling Distance) | 107.95 in | 2741.9 mm |
| Revolutions per Distance | 605 revs/mile | 376 revs/km |
| Wheel Rim Diameter | 17 in | 431.8 mm |
| Approved Rim Width Range | 8.5" – 11.0" | 216 – 279 mm |
| Measuring / Ideal Rim Width | 9.8 in | 249 mm |
| Aspect Ratio (Profile %) | 70% of section width | |
What 315/70R17 Is Typically Used For
Dimensions in this range are typical of pickups, SUVs and off-road fitments, where load capacity and sidewall strength matter more than steering response.
To find the size your specific vehicle takes, check the placard on the driver-side door jamb or your owner's manual. Fitment depends on model year, trim, brake caliper clearance, wheel offset and suspension setup, so the correct size for your car is the one the manufacturer specifies.
Popular Comparisons with 315/70R17
Frequently Asked Questions about 315/70R17
What size is 315/70R17 in inches?
The 315/70R17 tire measures approximately 34.36" in overall diameter, 12.4" in section width (tread/sidewall cross-section), and is mounted on a 17" diameter wheel rim. The same size is often written 315/70/17 or 315-70-17.
What rim width is recommended for 315/70R17?
The approved rim width range for 315/70R17 is 8.5" to 11.0" wide, with an ideal measuring rim width of 9.8" for optimal tread contact and even wear.
What are the closest safe alternative sizes for 315/70R17?
Always verify rolling diameter stays within ±3% of 34.36" to prevent transmission strain and speedometer inaccuracies.
How many revolutions per mile does 315/70R17 make?
A standard 315/70R17 tire rotates approximately 605 revolutions per mile (376 revs per kilometer) at normal inflation pressure and rolling radius.