255/30R22 tire size in inches

A 255/30R22 tire measures

28.0" tall × 10.0" wide

3.01" sidewall on a 22" wheel. 720 revolutions per mile.

255/30R22 means a tire 255 mm wide, with sidewalls 30% as tall as the tire is wide (77 mm), radial construction (R), for a 22 inch wheel.

28.0"22" rim3.0"10.0" wide
255/30R22: 28.0 inches tall, 10.0 inches wide, on a 22 inch rim, drawn to scale

255/30R22 specs

Overall diameter (height)28.02 inches (712 mm)
Section width10.04 inches (255 mm)
Sidewall height3.01 inches (77 mm)
Wheel (rim) diameter22 inches
Circumference88.0 inches (2,236 mm)
Revolutions per mile720
Revolutions per kilometer447
Approximate rim width8.5" to 10.0"
In inches (flotation style)28.0x10.0R22
Aspect ratio30%

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 255/30R22 on a 22" wheel

These 22" sizes are within 3% of 255/30R22's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
305/25R2228.00"12.01"−0.1%60.0 mphCompare
315/25R2228.20"12.40"+0.6%60.4 mphCompare
295/25R2227.81"11.61"−0.8%59.5 mphCompare
265/30R2228.26"10.43"+0.8%60.5 mphCompare
245/30R2227.79"9.65"−0.8%59.5 mphCompare
325/25R2228.40"12.80"+1.3%60.8 mphCompare
285/25R2227.61"11.22"−1.5%59.1 mphCompare
235/35R2228.48"9.25"+1.6%61.0 mphCompare
275/30R2228.50"10.83"+1.7%61.0 mphCompare
235/30R2227.55"9.25"−1.7%59.0 mphCompare
335/25R2228.59"13.19"+2.0%61.2 mphCompare
275/25R2227.41"10.83"−2.2%58.7 mphCompare

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

SizeWheelDiameterDifference
235/65R1616"28.03"0.0%Compare
255/35R2121"28.03"0.0%Compare
255/40R2020"28.03"0.0%Compare
255/45R1919"28.04"0.0%Compare
255/50R1818"28.04"+0.1%Compare
255/55R1717"28.04"+0.1%Compare
215/65R1717"28.00"−0.1%Compare
255/60R1616"28.05"+0.1%Compare
195/85R1515"28.05"+0.1%Compare
255/65R1515"28.05"+0.1%Compare
255/70R1414"28.06"+0.1%Compare
275/60R1515"27.99"−0.1%Compare

One size up or down

Compare 255/30R22 with another size

With 265/30R22 tires, when your speedometer says 60 mph you are really going

60.5 mph

265/30R22 is +0.24 inches (+0.8%) in overall diameter. That is within the 3% most shops and makers allow.

255/30R22265/30R22Difference%
Overall diameter28.02"28.26"+0.24"+0.8%
Section width10.04"10.43"+0.39"+3.9%
Sidewall height3.01"3.13"+0.12"+3.9%
Circumference88.04"88.78"+0.74"+0.8%
Revolutions per mile719.7713.7−6.0−0.8%

Questions

How tall is a 255/30R22 tire?
A 255/30R22 tire is 28.0 inches tall (712 mm), calculated from the size. It is 10.0 inches wide with 3.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 255/30R22 mean?
255/30R22 means a tire 255 mm wide, with sidewalls 30% as tall as the tire is wide (77 mm), radial construction (R), for a 22 inch wheel.
How many revolutions per mile does a 255/30R22 tire make?
About 720 revolutions per mile, based on a circumference of 88.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 255/30R22 tire?
Roughly 8.5" to 10.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 305/25R22 instead of 255/30R22?
305/25R22 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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