33.6" tall, 12.0" wide, 4.8" sidewall
A 305/40R24 tire is 33.6 inches (854 mm) tall and 12.0 inches wide. The sidewall is 40% of the width, 4.8 inches, on a 24-inch wheel, and the tire turns about 600 times per mile.
In flotation terms that is about 33.6x12.0R24. People often call it a 34-inch tire.
The size most often compared with it is 295/40R24, which is 0.3" shorter (−0.9%). At an indicated 60 mph you would be doing 59.4 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 24" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 305/40R24 | |
|---|---|---|---|---|---|
| 295/40R24 | 33.3" | 11.6" | 4.6" | −0.9% | |
| 285/40R24 | 33.0" | 11.2" | 4.5" | −1.9% | |
| 295/45R24 | 34.5" | 11.6" | 5.2" | +2.5% | |
| 315/35R24 | 32.7" | 12.4" | 4.3" | −2.8% | |
| 305/35R24 | 32.4" | 12.0" | 4.2" | −3.6% | |
| 305/45R24 | 34.8" | 12.0" | 5.4" | +3.6% | |
| 35x12.50R24 | 35.0" | 12.5" | 5.5" | +4.1% | |
| 315/45R24 | 35.2" | 12.4" | 5.6" | +4.6% | |
| 285/35R24 | 31.9" | 11.2" | 3.9" | −5.2% | |
| 325/45R24 | 35.5" | 12.8" | 5.8" | +5.7% |
Sizes within 2% of 33.6" on 22" wheels.
| Size | Diameter | Width | Sidewall | vs 305/40R24 | |
|---|---|---|---|---|---|
| 295/50R22 | 33.6" | 11.6" | 5.8" | +0.0% | |
| 325/45R22 | 33.5" | 12.8" | 5.8" | −0.3% | |
| 275/55R22 | 33.9" | 10.8" | 6.0" | +0.9% | |
| 285/50R22 | 33.2" | 11.2" | 5.6" | −1.1% | |
| 305/50R22 | 34.0" | 12.0" | 6.0" | +1.2% | |
| 315/45R22 | 33.2" | 12.4" | 5.6" | −1.3% |
Actual speed when the speedometer is calibrated for 305/40R24.
| Speedometer shows | on 295/40R24 | on 285/40R24 | on 295/45R24 |
|---|---|---|---|
| 30 mph | 29.7 mph | 29.4 mph | 30.8 mph |
| 45 mph | 44.6 mph | 44.2 mph | 46.1 mph |
| 60 mph | 59.4 mph | 58.9 mph | 61.5 mph |
| 70 mph | 69.3 mph | 68.7 mph | 71.8 mph |
33.6 inches (854 mm). The sidewall is 4.8 inches.
12.0 inches (305 mm) section width, measured sidewall to sidewall.
About 33.6x12.0R24.
295/40R24 is −0.9% in diameter, within the common 3% guideline. It is 0.4" narrower.