32.8" tall, 12.0" wide, 5.4" sidewall
A 305/45R22 tire is 32.8 inches (833 mm) tall and 12.0 inches wide. The sidewall is 45% of the width, 5.4 inches, on a 22-inch wheel, and the tire turns about 615 times per mile.
In flotation terms that is about 32.8x12.0R22, closest to the common 33x12.50R22 (33.0"). People often call it a 33-inch tire.
The size most often compared with it is 285/50R22, which is 0.4" taller (+1.3%). At an indicated 60 mph you would be doing 60.8 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 305/45R22 | |
|---|---|---|---|---|---|
| 33x12.50R22 | 33.0" | 12.5" | 5.5" | +0.6% | compare |
| 295/45R22 | 32.5" | 11.6" | 5.2" | −1.1% | |
| 315/45R22 | 33.2" | 12.4" | 5.6" | +1.1% | |
| 285/50R22 | 33.2" | 11.2" | 5.6" | +1.3% | compare |
| 325/40R22 | 32.2" | 12.8" | 5.1" | −1.7% | |
| 325/45R22 | 33.5" | 12.8" | 5.8" | +2.2% | |
| 295/50R22 | 33.6" | 11.6" | 5.8" | +2.5% | |
| 315/40R22 | 31.9" | 12.4" | 5.0" | −2.7% | |
| 305/40R22 | 31.6" | 12.0" | 4.8" | −3.7% | compare |
| 305/50R22 | 34.0" | 12.0" | 6.0" | +3.7% |
Sizes within 2% of 32.8" on 20" or 24" wheels.
| Size | Diameter | Width | Sidewall | vs 305/45R22 | |
|---|---|---|---|---|---|
| 325/50R20 | 32.8" | 12.8" | 6.4" | −0.0% | |
| 295/55R20 | 32.8" | 11.6" | 6.4" | −0.1% | |
| 315/35R24 | 32.7" | 12.4" | 4.3" | −0.4% | |
| 285/40R24 | 33.0" | 11.2" | 4.5" | +0.5% | |
| 275/60R20 | 33.0" | 10.8" | 6.5" | +0.6% | |
| 33x12.50R20 | 33.0" | 12.5" | 6.5" | +0.6% |
Actual speed when the speedometer is calibrated for 305/45R22.
| Speedometer shows | on 285/50R22 | on 305/40R22 | on 33x12.50R22 |
|---|---|---|---|
| 30 mph | 30.4 mph | 28.9 mph | 30.2 mph |
| 45 mph | 45.6 mph | 43.4 mph | 45.3 mph |
| 60 mph | 60.8 mph | 57.8 mph | 60.4 mph |
| 70 mph | 70.9 mph | 67.4 mph | 70.4 mph |
32.8 inches (833 mm). The sidewall is 5.4 inches.
12.0 inches (305 mm) section width, measured sidewall to sidewall.
About 32.8x12.0R22; the closest common flotation size is 33x12.50R22 at 33.0".
285/50R22 is +1.3% in diameter, within the common 3% guideline. It is 0.8" narrower.