225/55R19 tire size in inches

A 225/55R19 tire measures

28.7" tall × 8.9" wide

4.87" sidewall on a 19" wheel. 702 revolutions per mile.

225/55R19 means a tire 225 mm wide, with sidewalls 55% as tall as the tire is wide (124 mm), radial construction (R), for a 19 inch wheel.

28.7"19" rim4.9"8.9" wide
225/55R19: 28.7 inches tall, 8.9 inches wide, on a 19 inch rim, drawn to scale

225/55R19 specs

Overall diameter (height)28.74 inches (730 mm)
Section width8.86 inches (225 mm)
Sidewall height4.87 inches (124 mm)
Wheel (rim) diameter19 inches
Circumference90.3 inches (2,294 mm)
Revolutions per mile702
Revolutions per kilometer436
Approximate rim width6.5" to 8.0"
In inches (flotation style)28.7x8.9R19
Aspect ratio55%

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 225/55R19 on a 19" wheel

These 19" sizes are within 3% of 225/55R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
275/45R1928.74"10.83"0.0%60.0 mphCompare
355/35R1928.78"13.98"+0.1%60.1 mphCompare
205/60R1928.69"8.07"−0.2%59.9 mphCompare
245/50R1928.65"9.65"−0.3%59.8 mphCompare
305/40R1928.61"12.01"−0.5%59.7 mphCompare
315/40R1928.92"12.40"+0.6%60.4 mphCompare
345/35R1928.51"13.58"−0.8%59.5 mphCompare
255/50R1929.04"10.04"+1.0%60.6 mphCompare
285/45R1929.10"11.22"+1.2%60.7 mphCompare
265/45R1928.39"10.43"−1.2%59.3 mphCompare
215/60R1929.16"8.46"+1.4%60.9 mphCompare
215/55R1928.31"8.46"−1.5%59.1 mphCompare

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

SizeWheelDiameterDifference
195/70R1818"28.75"0.0%Compare
245/35R2222"28.75"0.0%Compare
285/30R2222"28.73"0.0%Compare
235/85R1313"28.73"−0.1%Compare
205/85R1515"28.72"−0.1%Compare
245/40R2121"28.72"−0.1%Compare
295/55R1616"28.78"+0.1%Compare
215/75R1616"28.70"−0.2%Compare
345/25R2222"28.79"+0.2%Compare
235/80R1414"28.80"+0.2%Compare
245/45R2020"28.68"−0.2%Compare
305/45R1818"28.81"+0.2%Compare

One size up or down

Compare 225/55R19 with another size

With 235/55R19 tires, when your speedometer says 60 mph you are really going

60.9 mph

235/55R19 is +0.43 inches (+1.5%) in overall diameter. That is within the 3% most shops and makers allow.

225/55R19235/55R19Difference%
Overall diameter28.74"29.18"+0.43"+1.5%
Section width8.86"9.25"+0.39"+4.4%
Sidewall height4.87"5.09"+0.22"+4.4%
Circumference90.30"91.66"+1.36"+1.5%
Revolutions per mile701.6691.2−10.4−1.5%

Questions

How tall is a 225/55R19 tire?
A 225/55R19 tire is 28.7 inches tall (730 mm), calculated from the size. It is 8.9 inches wide with 4.9 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 225/55R19 mean?
225/55R19 means a tire 225 mm wide, with sidewalls 55% as tall as the tire is wide (124 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 225/55R19 tire make?
About 702 revolutions per mile, based on a circumference of 90.3 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 225/55R19 tire?
Roughly 6.5" to 8.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 275/45R19 instead of 225/55R19?
275/45R19 is 0.00 inches (0.0%) 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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