285/40R22 tire size in inches

A 285/40R22 tire measures

31.0" tall × 11.2" wide

4.49" sidewall on a 22" wheel. 651 revolutions per mile.

285/40R22 means a tire 285 mm wide, with sidewalls 40% as tall as the tire is wide (114 mm), radial construction (R), for a 22 inch wheel.

31.0"22" rim4.5"11.2" wide
285/40R22: 31.0 inches tall, 11.2 inches wide, on a 22 inch rim, drawn to scale

285/40R22 specs

Overall diameter (height)30.98 inches (787 mm)
Section width11.22 inches (285 mm)
Sidewall height4.49 inches (114 mm)
Wheel (rim) diameter22 inches
Circumference97.3 inches (2,472 mm)
Revolutions per mile651
Revolutions per kilometer405
Approximate rim width9.5" to 11.0"
In inches (flotation style)31.0x11.2R22
Aspect ratio40%

Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.

Sizes that can replace 285/40R22 on a 22" wheel

These 22" sizes are within 3% of 285/40R22's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
325/35R2230.96"12.80"−0.1%60.0 mphCompare
255/45R2231.04"10.04"+0.2%60.1 mphCompare
335/35R2231.23"13.19"+0.8%60.5 mphCompare
235/50R2231.25"9.25"+0.9%60.5 mphCompare
245/45R2230.68"9.65"−1.0%59.4 mphCompare
315/35R2230.68"12.40"−1.0%59.4 mphCompare
275/40R2230.66"10.83"−1.0%59.4 mphCompare
295/40R2231.29"11.61"+1.0%60.6 mphCompare
265/45R2231.39"10.43"+1.3%60.8 mphCompare
345/35R2231.51"13.58"+1.7%61.0 mphCompare
305/35R2230.41"12.01"−1.8%58.9 mphCompare
355/30R2230.39"13.98"−1.9%58.9 mphCompare

Same height on other wheel sizes (plus and minus sizing)

SizeWheelDiameterDifference
295/30R2424"30.97"0.0%Compare
355/25R2424"30.99"0.0%Compare
275/60R1818"30.99"+0.1%Compare
235/70R1818"30.95"−0.1%Compare
31x10.50R1515"31.00"+0.1%Compare
215/65R2020"31.00"+0.1%Compare
305/50R1919"31.01"+0.1%Compare
295/60R1717"30.94"−0.1%Compare
235/65R1919"31.03"+0.2%Compare
255/35R2424"31.03"+0.2%Compare
315/40R2121"30.92"−0.2%Compare
255/50R2121"31.04"+0.2%Compare

One size up or down

Compare 285/40R22 with another size

With 295/40R22 tires, when your speedometer says 60 mph you are really going

60.6 mph

295/40R22 is +0.31 inches (+1.0%) in overall diameter. That is within the 3% most shops and makers allow.

285/40R22295/40R22Difference%
Overall diameter30.98"31.29"+0.31"+1.0%
Section width11.22"11.61"+0.39"+3.5%
Sidewall height4.49"4.65"+0.16"+3.5%
Circumference97.32"98.30"+0.99"+1.0%
Revolutions per mile651.1644.5−6.6−1.0%

Questions

How tall is a 285/40R22 tire?
A 285/40R22 tire is 31.0 inches tall (787 mm), calculated from the size. It is 11.2 inches wide with 4.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 285/40R22 mean?
285/40R22 means a tire 285 mm wide, with sidewalls 40% as tall as the tire is wide (114 mm), radial construction (R), for a 22 inch wheel.
How many revolutions per mile does a 285/40R22 tire make?
About 651 revolutions per mile, based on a circumference of 97.3 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 285/40R22 tire?
Roughly 9.5" to 11.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 325/35R22 instead of 285/40R22?
325/35R22 is −0.02 inches (−0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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