225/40R19 tire size in inches

A 225/40R19 tire measures

26.1" tall × 8.9" wide

3.54" sidewall on a 19" wheel. 773 revolutions per mile.

225/40R19 means a tire 225 mm wide, with sidewalls 40% as tall as the tire is wide (90 mm), radial construction (R), for a 19 inch wheel.

26.1"19" rim3.5"8.9" wide
225/40R19: 26.1 inches tall, 8.9 inches wide, on a 19 inch rim, drawn to scale

225/40R19 specs

Overall diameter (height)26.09 inches (663 mm)
Section width8.86 inches (225 mm)
Sidewall height3.54 inches (90 mm)
Wheel (rim) diameter19 inches
Circumference82.0 inches (2,082 mm)
Revolutions per mile773
Revolutions per kilometer480
Approximate rim width7.5" to 9.0"
In inches (flotation style)26.1x8.9R19
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 225/40R19 on a 19" wheel

These 19" sizes are within 3% of 225/40R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
255/35R1926.03"10.04"−0.2%59.9 mphCompare
355/25R1925.99"13.98"−0.4%59.8 mphCompare
305/30R1926.20"12.01"+0.5%60.3 mphCompare
295/30R1925.97"11.61"−0.5%59.7 mphCompare
205/45R1926.26"8.07"+0.7%60.4 mphCompare
265/35R1926.30"10.43"+0.8%60.5 mphCompare
345/25R1925.79"13.58"−1.1%59.3 mphCompare
215/40R1925.77"8.46"−1.2%59.3 mphCompare
235/40R1926.40"9.25"+1.2%60.7 mphCompare
245/35R1925.75"9.65"−1.3%59.2 mphCompare
315/30R1926.44"12.40"+1.4%60.8 mphCompare
285/30R1925.73"11.22"−1.4%59.2 mphCompare

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

SizeWheelDiameterDifference
285/45R1616"26.10"0.0%Compare
235/60R1515"26.10"+0.1%Compare
205/50R1818"26.07"−0.1%Compare
205/75R1414"26.11"+0.1%Compare
195/85R1313"26.05"−0.1%Compare
255/60R1414"26.05"−0.2%Compare
295/35R1818"26.13"+0.2%Compare
165/85R1515"26.04"−0.2%Compare
255/55R1515"26.04"−0.2%Compare
255/50R1616"26.04"−0.2%Compare
255/45R1717"26.04"−0.2%Compare
255/40R1818"26.03"−0.2%Compare

One size up or down

Compare 225/40R19 with another size

With 235/40R19 tires, when your speedometer says 60 mph you are really going

60.7 mph

235/40R19 is +0.31 inches (+1.2%) in overall diameter. That is within the 3% most shops and makers allow.

225/40R19235/40R19Difference%
Overall diameter26.09"26.40"+0.31"+1.2%
Section width8.86"9.25"+0.39"+4.4%
Sidewall height3.54"3.70"+0.16"+4.4%
Circumference81.95"82.94"+0.99"+1.2%
Revolutions per mile773.1763.9−9.2−1.2%

Questions

How tall is a 225/40R19 tire?
A 225/40R19 tire is 26.1 inches tall (663 mm), calculated from the size. It is 8.9 inches wide with 3.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 225/40R19 mean?
225/40R19 means a tire 225 mm wide, with sidewalls 40% as tall as the tire is wide (90 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 225/40R19 tire make?
About 773 revolutions per mile, based on a circumference of 82.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 225/40R19 tire?
Roughly 7.5" to 9.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 255/35R19 instead of 225/40R19?
255/35R19 is −0.06 inches (−0.2%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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