31.0" tall, 11.2" wide, 4.5" sidewall
A 285/40R22 tire is 31.0 inches (787 mm) tall and 11.2 inches wide. The sidewall is 40% of the width, 4.5 inches, on a 22-inch wheel, and the tire turns about 651 times per mile.
In flotation terms that is about 31.0x11.2R22. People often call it a 31-inch tire.
The size most often compared with it is 285/35R22, which is 1.1" shorter (−3.6%). At an indicated 60 mph you would be doing 57.8 mph on it, more than the 3% change many shops use as a limit.
| 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 285/40R22 | |
|---|---|---|---|---|---|
| 295/40R22 | 31.3" | 11.6" | 4.6" | +1.0% | |
| 265/45R22 | 31.4" | 10.4" | 4.7" | +1.3% | |
| 305/35R22 | 30.4" | 12.0" | 4.2" | −1.8% | |
| 305/40R22 | 31.6" | 12.0" | 4.8" | +2.0% | |
| 275/45R22 | 31.7" | 10.8" | 4.9" | +2.5% | |
| 295/35R22 | 30.1" | 11.6" | 4.1" | −2.7% | |
| 285/35R22 | 29.9" | 11.2" | 3.9" | −3.6% | compare |
| 265/50R22 | 32.4" | 10.4" | 5.2" | +4.7% | |
| 295/45R22 | 32.5" | 11.6" | 5.2" | +4.8% | |
| 305/30R22 | 29.2" | 12.0" | 3.6" | −5.7% |
Sizes within 2% of 31.0" on 24" or 20" wheels.
| Size | Diameter | Width | Sidewall | vs 285/40R22 | |
|---|---|---|---|---|---|
| 295/30R24 | 31.0" | 11.6" | 3.5" | −0.0% | |
| 275/50R20 | 30.8" | 10.8" | 5.4" | −0.5% | |
| 305/45R20 | 30.8" | 12.0" | 5.4" | −0.5% | |
| 315/45R20 | 31.2" | 12.4" | 5.6" | +0.6% | |
| 285/50R20 | 31.2" | 11.2" | 5.6" | +0.8% | |
| 245/55R20 | 30.6" | 9.6" | 5.3" | −1.2% |
Actual speed when the speedometer is calibrated for 285/40R22.
| Speedometer shows | on 285/35R22 | on 295/40R22 | on 265/45R22 |
|---|---|---|---|
| 30 mph | 28.9 mph | 30.3 mph | 30.4 mph |
| 45 mph | 43.4 mph | 45.5 mph | 45.6 mph |
| 60 mph | 57.8 mph | 60.6 mph | 60.8 mph |
| 70 mph | 67.5 mph | 70.7 mph | 70.9 mph |
31.0 inches (787 mm). The sidewall is 4.5 inches.
11.2 inches (285 mm) section width, measured sidewall to sidewall.
About 31.0x11.2R22.
285/35R22 is −3.6% in diameter, more than the common 3% guideline, so expect a speedometer error and check clearance. It is 0.0" wider.