315/70R17 dimensions
| Measure | Inches | Millimetres |
|---|---|---|
| Overall height | 34.36 in | 873 mm |
| Section width | 12.40 in | 315 mm |
| Sidewall height | 8.68 in | 220.5 mm |
| Wheel diameter | 17 in | 432 mm |
| Circumference | 108.0 in | 2,742 mm |
| Revolutions per mile | 586.9 |
The math
| Step | Math | Result |
|---|---|---|
| Sidewall | 315 × 70% = 220.5 mm ÷ 25.4 | 8.68 in |
| Overall height | 17 + 2 × 8.68 | 34.36 in |
| Width | 315 mm ÷ 25.4 | 12.40 in |
| Circumference | π × 34.36 | 108.0 in |
| Revs per mile | 63,360 ÷ 108.0 | 586.9 |
With a 8.7 in sidewall this is a very tall sidewall, the kind seen on light-truck and off-road sizes, with plenty of cushion and flex. Real tires vary by brand and model, and the loaded radius under the vehicle is a bit smaller than this unloaded figure.
One step either way on a 17 in wheel
Each row changes one thing and shows the height change against 315/70R17, plus what 60 mph on the speedometer would really be if you swapped to that size.
| Change | Size | Height | Height change | 60 mph shows as | Verdict |
|---|---|---|---|---|---|
| Wider | 325/70R17 (compare) | 34.9 in | +1.6% | 61.0 mph | Close match |
| Narrower | 305/70R17 (compare) | 33.8 in | -1.6% | 59.0 mph | Close match |
| Taller sidewall | 315/75R17 (compare) | 35.6 in | +3.6% | 62.2 mph | Check clearance |
| Shorter sidewall | 315/65R17 (compare) | 33.1 in | -3.6% | 57.8 mph | Check clearance |
| Wider, shorter sidewall | 325/65R17 (compare) | 33.6 in | -2.1% | 58.7 mph | Close match |
| Narrower, taller sidewall | 305/75R17 (compare) | 35.0 in | +1.9% | 61.1 mph | Close match |
Calculated sizes within ±3% on other wheels
Plus and minus sizes that keep the overall height within about 3% (a rule of thumb from Discount Tire and 1010tires), widths within 30 mm. Calculated, not a list of tires on sale: check that a tire exists in that size.
16 in wheels (one wheel size smaller)
| Size | Height | Height change | Width change |
|---|---|---|---|
| 335/70R16 (compare) | 34.5 in | +0.3% | +20 mm |
| 295/80R16 (compare) | 34.6 in | +0.6% | -20 mm |
| 315/75R16 (compare) | 34.6 in | +0.7% | +0 mm |
| 305/75R16 (compare) | 34.0 in | -1.0% | -10 mm |
18 in wheels (one wheel size larger)
| Size | Height | Height change | Width change |
|---|---|---|---|
| 345/60R18 (compare) | 34.3 in | -0.2% | +30 mm |
| 295/70R18 (compare) | 34.3 in | -0.3% | -20 mm |
| 315/65R18 (compare) | 34.1 in | -0.7% | +0 mm |
| 325/65R18 (compare) | 34.6 in | +0.8% | +10 mm |
19 in wheels (two wheel sizes larger)
| Size | Height | Height change | Width change |
|---|---|---|---|
| 325/60R19 (compare) | 34.4 in | -0.0% | +10 mm |
| 305/65R19 (compare) | 34.6 in | +0.7% | -10 mm |
| 295/65R19 (compare) | 34.1 in | -0.8% | -20 mm |
| 285/70R19 (compare) | 34.7 in | +1.0% | -30 mm |
Try it with your numbers
Compare 315/70R17 with another size · Convert to metric or find a 33 in size · Sizes that fit my wheel
Calculated from the size alone. Real tires vary a little by brand and model, and the loaded radius is a bit smaller. Confirm the wheel width range, clearance, load index and speed rating for your vehicle. See how to read a tire size, the load index chart and the speed rating chart.
Browse: all sizes in inches · 305/65R17 · 215/50R18.