Tire Ruler285/40R22 dimensions
| Overall diameter (height) | 30.98″ · 787 mm |
| Section width | 11.22″ · 285 mm |
| Sidewall height | 4.49″ · 114 mm |
| Wheel diameter | 22″ |
| Rim width (rule of thumb) | 8–10″ |
| Circumference | 97.3″ |
| Revolutions per mile | 651 |
| In inches (flotation style) | 31.0 × 11.2R22 |
How it’s calculated: the sidewall is 40% of the 285 mm width = 114.0 mm (4.49″). Add two sidewalls to the 22″ wheel: 22 + 2 × 4.49 = 30.98″.
Bigger tires than 285/40R22 on 22″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 275/45R22 | 31.7″ | +0.77″ (+2.5%) | 61.5 mph |
| 285/45R22 | 32.1″ | +1.12″ (+3.6%) | 62.2 mph |
| 305/45R22 | 32.8″ | +1.83″ (+5.9%) | 63.5 mph |
| 275/50R22 | 32.8″ | +1.85″ (+6.0%) | 63.6 mph |
| 33x12.50R22 | 33.0″ | +2.02″ (+6.5%) | 63.9 mph |
“60 mph reads” is your real speed when a speedometer set up for 285/40R22 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 31x10.50R15: 31.0″ tall on a 15″ wheel (+0.1%)
- 265/70R16: 30.6″ tall on a 16″ wheel (−1.2%)
- 255/70R17: 31.1″ tall on a 17″ wheel (+0.3%)
- 265/65R17: 30.6″ tall on a 17″ wheel (−1.3%)
- 275/65R17: 31.1″ tall on a 17″ wheel (+0.3%)
- 265/60R18: 30.5″ tall on an 18″ wheel (−1.5%)
- 255/65R18: 31.1″ tall on an 18″ wheel (+0.2%)
- 245/65R18: 30.5″ tall on an 18″ wheel (−1.4%)
- 275/60R18: 31.0″ tall on an 18″ wheel (+0.1%)
- 255/60R19: 31.0″ tall on a 19″ wheel (+0.2%)
- 255/55R20: 31.0″ tall on a 20″ wheel (+0.2%)
- 285/50R20: 31.2″ tall on a 20″ wheel (+0.8%)
- 275/50R20: 30.8″ tall on a 20″ wheel (−0.5%)
- 275/45R21: 30.7″ tall on a 21″ wheel (−0.7%)
Frequently asked questions
Is 285/40R22 a 31 inch tire?
Yes. 285/40R22 is 30.98 inches tall, so it's sold and talked about as a 31-inch tire.
What size is 285/40R22 in inches?
285/40R22 is 31.0 inches tall (overall diameter), 11.2 inches wide, with a 4.5 inch sidewall, and fits a 22 inch wheel.
What tire size is equivalent to 285/40R22?
No common size on a 22" wheel is within 1.5% of 285/40R22's diameter. Use the calculator above to compare any size.
What rim width fits 285/40R22?
As a rule of thumb, about 8–10 inches. The tire maker's spec sheet lists the approved range for each model.
How many revolutions per mile does 285/40R22 make?
About 651 revolutions per mile in theory (circumference 97.3 in). Real tires turn slightly more because they flatten under load.