33.4" tall, 12.4" wide, 8.7" sidewall
A 315/70R16 tire is 33.4 inches (847 mm) tall and 12.4 inches wide. The sidewall is 70% of the width, 8.7 inches, on a 16-inch wheel, and the tire turns about 605 times per mile.
In flotation terms that is about 33.4x12.4R16, closest to the common 33x12.50R16 (33.0"). People often call it a 33-inch tire.
The size most often compared with it is 295/75R16, which is 0.1" taller (+0.2%). At an indicated 60 mph you would be doing 60.1 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 16" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 315/70R16 | |
|---|---|---|---|---|---|
| 295/75R16 | 33.4" | 11.6" | 8.7" | +0.2% | |
| 33x12.50R16 | 33.0" | 12.5" | 8.5" | −1.1% | |
| 305/70R16 | 32.8" | 12.0" | 8.4" | −1.7% | |
| 305/75R16 | 34.0" | 12.0" | 9.0" | +1.9% | |
| 295/70R16 | 32.3" | 11.6" | 8.1" | −3.3% | |
| 315/75R16 | 34.6" | 12.4" | 9.3" | +3.7% | |
| 325/75R16 | 35.2" | 12.8" | 9.6" | +5.5% | |
| 315/80R16 | 35.8" | 12.4" | 9.9" | +7.4% | |
| 325/80R16 | 36.5" | 12.8" | 10.2" | +9.3% |
Sizes within 2% of 33.4" on 18" or 17" or 15" wheels.
| Size | Diameter | Width | Sidewall | vs 315/70R16 | |
|---|---|---|---|---|---|
| 325/60R18 | 33.4" | 12.8" | 7.7" | −0.0% | |
| 245/85R17 | 33.4" | 9.6" | 8.2" | +0.1% | |
| 295/70R17 | 33.3" | 11.6" | 8.1" | −0.3% | |
| 275/70R18 | 33.2" | 10.8" | 7.6" | −0.6% | |
| 315/65R17 | 33.1" | 12.4" | 8.1" | −0.7% | |
| 315/75R15 | 33.6" | 12.4" | 9.3" | +0.7% |
Actual speed when the speedometer is calibrated for 315/70R16.
| Speedometer shows | on 295/75R16 | on 33x12.50R16 | on 305/70R16 |
|---|---|---|---|
| 30 mph | 30.1 mph | 29.7 mph | 29.5 mph |
| 45 mph | 45.1 mph | 44.5 mph | 44.3 mph |
| 60 mph | 60.1 mph | 59.3 mph | 59.0 mph |
| 70 mph | 70.1 mph | 69.2 mph | 68.8 mph |
33.4 inches (847 mm). The sidewall is 8.7 inches.
12.4 inches (315 mm) section width, measured sidewall to sidewall.
About 33.4x12.4R16; the closest common flotation size is 33x12.50R16 at 33.0".
295/75R16 is +0.2% in diameter, within the common 3% guideline. It is 0.8" narrower.