Tire Ruler315/70R17 dimensions
| Overall diameter (height) | 34.36″ · 873 mm |
| Section width | 12.40″ · 315 mm |
| Sidewall height | 8.68″ · 220 mm |
| Wheel diameter | 17″ |
| Rim width (rule of thumb) | 8.5–11″ |
| Circumference | 108.0″ |
| Revolutions per mile | 587 |
| In inches (flotation style) | 34.4 × 12.4R17 |
How it’s calculated: the sidewall is 70% of the 315 mm width = 220.5 mm (8.68″). Add two sidewalls to the 17″ wheel: 17 + 2 × 8.68 = 34.36″.
Bigger tires than 315/70R17 on 17″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 35x12.50R17 | 35.0″ | +0.64″ (+1.9%) | 61.1 mph |
“60 mph reads” is your real speed when a speedometer set up for 315/70R17 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Sizes equivalent to 315/70R17
Within 1.5% of the same height on a 17″ wheel. Usually interchangeable for the speedometer; check width, load index and clearance.
| Size | Height | Width | Difference |
|---|---|---|---|
| 34x10.50R17 | 34.0″ | 10.5″ | −1.1% |
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 315/75R16: 34.6″ tall on a 16″ wheel (+0.7%)
- 295/70R18: 34.3″ tall on an 18″ wheel (−0.3%)
- 285/75R18: 34.8″ tall on an 18″ wheel (+1.4%)
- 325/65R18: 34.6″ tall on an 18″ wheel (+0.8%)
- 275/65R20: 34.1″ tall on a 20″ wheel (−0.8%)
- 285/65R20: 34.6″ tall on a 20″ wheel (+0.7%)
- 295/60R20: 33.9″ tall on a 20″ wheel (−1.2%)
- 34x11.50R20: 34.0″ tall on a 20″ wheel (−1.1%)
Popular 315/70R17 comparisons
Frequently asked questions
Is 315/70R17 a 34 inch tire?
Not quite. 315/70R17 is 34.36 inches tall, between a 34 and a 35 inch tire.
What size is 315/70R17 in inches?
315/70R17 is 34.4 inches tall (overall diameter), 12.4 inches wide, with a 8.7 inch sidewall, and fits a 17 inch wheel.
What tire size is equivalent to 315/70R17?
Sizes within 1.5% of the same diameter on a 17" wheel: 34x10.50R17 (34.0"). Check load index and width before swapping.
What rim width fits 315/70R17?
As a rule of thumb, about 8.5–11 inches. The tire maker's spec sheet lists the approved range for each model.
How many revolutions per mile does 315/70R17 make?
About 587 revolutions per mile in theory (circumference 108.0 in). Real tires turn slightly more because they flatten under load.