33.2" tall, 12.4" wide, 5.6" sidewall
A 315/45R22 tire is 33.2 inches (842 mm) tall and 12.4 inches wide. The sidewall is 45% of the width, 5.6 inches, on a 22-inch wheel, and the tire turns about 608 times per mile.
In flotation terms that is about 33.2x12.4R22, closest to the common 33x12.50R22 (33.0"). People often call it a 33-inch tire.
The size most often compared with it is 33x12.50R22, which is 0.2" shorter (−0.5%). At an indicated 60 mph you would be doing 59.7 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 22" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 315/45R22 | |
|---|---|---|---|---|---|
| 33x12.50R22 | 33.0" | 12.5" | 5.5" | −0.5% | |
| 305/45R22 | 32.8" | 12.0" | 5.4" | −1.1% | |
| 325/45R22 | 33.5" | 12.8" | 5.8" | +1.1% | |
| 295/50R22 | 33.6" | 11.6" | 5.8" | +1.4% | |
| 295/45R22 | 32.5" | 11.6" | 5.2" | −2.1% | |
| 305/50R22 | 34.0" | 12.0" | 6.0" | +2.6% | |
| 325/40R22 | 32.2" | 12.8" | 5.1" | −2.8% | |
| 315/40R22 | 31.9" | 12.4" | 5.0" | −3.7% | |
| 315/50R22 | 34.4" | 12.4" | 6.2" | +3.7% | |
| 305/40R22 | 31.6" | 12.0" | 4.8" | −4.7% |
Sizes within 2% of 33.2" on 20" or 24" wheels.
| Size | Diameter | Width | Sidewall | vs 315/45R22 | |
|---|---|---|---|---|---|
| 305/55R20 | 33.2" | 12.0" | 6.6" | +0.1% | |
| 255/65R20 | 33.1" | 10.0" | 6.5" | −0.3% | |
| 295/40R24 | 33.3" | 11.6" | 4.6" | +0.4% | |
| 33x12.50R20 | 33.0" | 12.5" | 6.5" | −0.5% | |
| 275/60R20 | 33.0" | 10.8" | 6.5" | −0.5% | |
| 285/40R24 | 33.0" | 11.2" | 4.5" | −0.6% |
Actual speed when the speedometer is calibrated for 315/45R22.
| Speedometer shows | on 33x12.50R22 | on 305/45R22 | on 325/45R22 |
|---|---|---|---|
| 30 mph | 29.9 mph | 29.7 mph | 30.3 mph |
| 45 mph | 44.8 mph | 44.5 mph | 45.5 mph |
| 60 mph | 59.7 mph | 59.4 mph | 60.6 mph |
| 70 mph | 69.7 mph | 69.3 mph | 70.7 mph |
33.2 inches (842 mm). The sidewall is 5.6 inches.
12.4 inches (315 mm) section width, measured sidewall to sidewall.
About 33.2x12.4R22; the closest common flotation size is 33x12.50R22 at 33.0".
33x12.50R22 is −0.5% in diameter, within the common 3% guideline. It is 0.1" wider.