33.1" tall, 12.4" wide, 8.1" sidewall
A 315/65R17 tire is 33.1 inches (841 mm) tall and 12.4 inches wide. The sidewall is 65% of the width, 8.1 inches, on a 17-inch wheel, and the tire turns about 609 times per mile.
In flotation terms that is about 33.1x12.4R17, closest to the common 33x12.50R17 (33.0"). People often call it a 33-inch tire.
The size most often compared with it is 33x12.50R17, which is 0.1" shorter (−0.4%). At an indicated 60 mph you would be doing 59.8 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
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Same 17" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 315/65R17 | |
|---|---|---|---|---|---|
| 33x12.50R17 | 33.0" | 12.5" | 8.0" | −0.4% | |
| 295/70R17 | 33.3" | 11.6" | 8.1" | +0.4% | |
| 305/65R17 | 32.6" | 12.0" | 7.8" | −1.5% | |
| 305/70R17 | 33.8" | 12.0" | 8.4" | +2.1% | |
| 295/65R17 | 32.1" | 11.6" | 7.5" | −3.1% | |
| 315/60R17 | 31.9" | 12.4" | 7.4" | −3.7% | |
| 315/70R17 | 34.4" | 12.4" | 8.7" | +3.7% | |
| 295/75R17 | 34.4" | 11.6" | 8.7" | +3.9% | |
| 305/60R17 | 31.4" | 12.0" | 7.2" | −5.2% | |
| 325/70R17 | 34.9" | 12.8" | 9.0" | +5.4% |
Sizes within 2% of 33.1" on 18" or 16" or 19" or 15" wheels.
| Size | Diameter | Width | Sidewall | vs 315/65R17 | |
|---|---|---|---|---|---|
| 295/65R18 | 33.1" | 11.6" | 7.5" | −0.1% | |
| 275/70R18 | 33.2" | 10.8" | 7.6" | +0.1% | |
| 255/85R16 | 33.1" | 10.0" | 8.5" | −0.2% | |
| 255/75R18 | 33.1" | 10.0" | 7.5" | −0.2% | |
| 255/70R19 | 33.1" | 10.0" | 7.0" | −0.2% | |
| 33x10.50R15 | 33.0" | 10.5" | 9.0" | −0.4% |
Actual speed when the speedometer is calibrated for 315/65R17.
| Speedometer shows | on 33x12.50R17 | on 295/70R17 | on 305/65R17 |
|---|---|---|---|
| 30 mph | 29.9 mph | 30.1 mph | 29.5 mph |
| 45 mph | 44.8 mph | 45.2 mph | 44.3 mph |
| 60 mph | 59.8 mph | 60.2 mph | 59.1 mph |
| 70 mph | 69.7 mph | 70.3 mph | 68.9 mph |
33.1 inches (841 mm). The sidewall is 8.1 inches.
12.4 inches (315 mm) section width, measured sidewall to sidewall.
About 33.1x12.4R17; the closest common flotation size is 33x12.50R17 at 33.0".
33x12.50R17 is −0.4% in diameter, within the common 3% guideline. It is 0.1" wider.