29.2" tall, 12.0" wide, 3.6" sidewall
A 305/30R22 tire is 29.2 inches (742 mm) tall and 12.0 inches wide. The sidewall is 30% of the width, 3.6 inches, on a 22-inch wheel, and the tire turns about 691 times per mile.
In flotation terms that is about 29.2x12.0R22. People often call it a 29-inch tire.
The size most often compared with it is 295/30R22, which is 0.2" shorter (−0.8%). At an indicated 60 mph you would be doing 59.5 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 305/30R22 | |
|---|---|---|---|---|---|
| 295/30R22 | 29.0" | 11.6" | 3.5" | −0.8% | |
| 315/30R22 | 29.4" | 12.4" | 3.7" | +0.8% | |
| 285/35R22 | 29.9" | 11.2" | 3.9" | +2.2% | |
| 295/35R22 | 30.1" | 11.6" | 4.1" | +3.2% | |
| 305/35R22 | 30.4" | 12.0" | 4.2" | +4.1% | |
| 325/35R22 | 31.0" | 12.8" | 4.5" | +6.0% | |
| 285/40R22 | 31.0" | 11.2" | 4.5" | +6.1% | |
| 295/40R22 | 31.3" | 11.6" | 4.6" | +7.1% | |
| 305/40R22 | 31.6" | 12.0" | 4.8" | +8.2% | |
| 315/40R22 | 31.9" | 12.4" | 5.0" | +9.3% |
Sizes within 2% of 29.2" on 20" or 24" wheels.
| Size | Diameter | Width | Sidewall | vs 305/30R22 | |
|---|---|---|---|---|---|
| 295/40R20 | 29.3" | 11.6" | 4.6" | +0.3% | |
| 325/35R20 | 29.0" | 12.8" | 4.5" | −0.8% | |
| 305/40R20 | 29.6" | 12.0" | 4.8" | +1.4% | |
| 315/35R20 | 28.7" | 12.4" | 4.3" | −1.8% | |
| 245/30R24 | 29.8" | 9.6" | 2.9" | +2.0% |
Actual speed when the speedometer is calibrated for 305/30R22.
| Speedometer shows | on 295/30R22 | on 315/30R22 | on 285/35R22 |
|---|---|---|---|
| 30 mph | 29.8 mph | 30.2 mph | 30.7 mph |
| 45 mph | 44.6 mph | 45.4 mph | 46.0 mph |
| 60 mph | 59.5 mph | 60.5 mph | 61.3 mph |
| 70 mph | 69.4 mph | 70.6 mph | 71.6 mph |
29.2 inches (742 mm). The sidewall is 3.6 inches.
12.0 inches (305 mm) section width, measured sidewall to sidewall.
About 29.2x12.0R22.
295/30R22 is −0.8% in diameter, within the common 3% guideline. It is 0.4" narrower.