32.4" tall, 12.0" wide, 4.2" sidewall
A 305/35R24 tire is 32.4 inches (823 mm) tall and 12.0 inches wide. The sidewall is 35% of the width, 4.2 inches, on a 24-inch wheel, and the tire turns about 622 times per mile.
In flotation terms that is about 32.4x12.0R24. People often call it a 32-inch tire.
The size most often compared with it is 285/40R24, which is 0.6" taller (+1.8%). At an indicated 60 mph you would be doing 61.1 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 305/35R24 | |
|---|---|---|---|---|---|
| 315/35R24 | 32.7" | 12.4" | 4.3" | +0.9% | |
| 285/35R24 | 31.9" | 11.2" | 3.9" | −1.7% | |
| 285/40R24 | 33.0" | 11.2" | 4.5" | +1.8% | compare |
| 295/40R24 | 33.3" | 11.6" | 4.6" | +2.7% | |
| 305/40R24 | 33.6" | 12.0" | 4.8" | +3.7% | |
| 295/30R24 | 31.0" | 11.6" | 3.5" | −4.4% | |
| 295/45R24 | 34.5" | 11.6" | 5.2" | +6.3% | |
| 305/45R24 | 34.8" | 12.0" | 5.4" | +7.4% | |
| 35x12.50R24 | 35.0" | 12.5" | 5.5" | +8.0% | |
| 315/45R24 | 35.2" | 12.4" | 5.6" | +8.5% |
Sizes within 2% of 32.4" on 22" wheels.
| Size | Diameter | Width | Sidewall | vs 305/35R24 | |
|---|---|---|---|---|---|
| 265/50R22 | 32.4" | 10.4" | 5.2" | +0.1% | |
| 295/45R22 | 32.5" | 11.6" | 5.2" | +0.1% | |
| 325/40R22 | 32.2" | 12.8" | 5.1" | −0.5% | |
| 305/45R22 | 32.8" | 12.0" | 5.4" | +1.2% | |
| 315/40R22 | 31.9" | 12.4" | 5.0" | −1.5% | |
| 33x12.50R22 | 33.0" | 12.5" | 5.5" | +1.8% |
Actual speed when the speedometer is calibrated for 305/35R24.
| Speedometer shows | on 285/40R24 | on 315/35R24 | on 285/35R24 |
|---|---|---|---|
| 30 mph | 30.5 mph | 30.3 mph | 29.5 mph |
| 45 mph | 45.8 mph | 45.4 mph | 44.2 mph |
| 60 mph | 61.1 mph | 60.5 mph | 59.0 mph |
| 70 mph | 71.2 mph | 70.6 mph | 68.8 mph |
32.4 inches (823 mm). The sidewall is 4.2 inches.
12.0 inches (305 mm) section width, measured sidewall to sidewall.
About 32.4x12.0R24.
285/40R24 is +1.8% in diameter, within the common 3% guideline. It is 0.8" narrower.