31.9" tall, 11.2" wide, 3.9" sidewall
A 285/35R24 tire is 31.9 inches (809 mm) tall and 11.2 inches wide. The sidewall is 35% of the width, 3.9 inches, on a 24-inch wheel, and the tire turns about 633 times per mile.
In flotation terms that is about 31.9x11.2R24. People often call it a 32-inch tire.
The size most often compared with it is 275/35R24, which is 0.3" shorter (−0.9%). At an indicated 60 mph you would be doing 59.5 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 285/35R24 | |
|---|---|---|---|---|---|
| 275/35R24 | 31.6" | 10.8" | 3.8" | −0.9% | |
| 305/35R24 | 32.4" | 12.0" | 4.2" | +1.7% | |
| 295/30R24 | 31.0" | 11.6" | 3.5" | −2.8% | |
| 285/40R24 | 33.0" | 11.2" | 4.5" | +3.5% | |
| 275/30R24 | 30.5" | 10.8" | 3.2" | −4.3% | |
| 295/40R24 | 33.3" | 11.6" | 4.6" | +4.5% | |
| 305/40R24 | 33.6" | 12.0" | 4.8" | +5.5% | |
| 295/45R24 | 34.5" | 11.6" | 5.2" | +8.2% | |
| 305/45R24 | 34.8" | 12.0" | 5.4" | +9.3% |
Sizes within 2% of 31.9" on 22" wheels.
| Size | Diameter | Width | Sidewall | vs 285/35R24 | |
|---|---|---|---|---|---|
| 315/40R22 | 31.9" | 12.4" | 5.0" | +0.2% | |
| 275/45R22 | 31.7" | 10.8" | 4.9" | −0.3% | |
| 305/40R22 | 31.6" | 12.0" | 4.8" | −0.8% | |
| 325/40R22 | 32.2" | 12.8" | 5.1" | +1.2% | |
| 265/45R22 | 31.4" | 10.4" | 4.7" | −1.5% | |
| 295/40R22 | 31.3" | 11.6" | 4.6" | −1.8% |
Actual speed when the speedometer is calibrated for 285/35R24.
| Speedometer shows | on 275/35R24 | on 305/35R24 | on 295/30R24 |
|---|---|---|---|
| 30 mph | 29.7 mph | 30.5 mph | 29.2 mph |
| 45 mph | 44.6 mph | 45.8 mph | 43.7 mph |
| 60 mph | 59.5 mph | 61.0 mph | 58.3 mph |
| 70 mph | 69.4 mph | 71.2 mph | 68.1 mph |
31.9 inches (809 mm). The sidewall is 3.9 inches.
11.2 inches (285 mm) section width, measured sidewall to sidewall.
About 31.9x11.2R24.
275/35R24 is −0.9% in diameter, within the common 3% guideline. It is 0.4" narrower.