205/40R19 tire size in inches

A 205/40R19 tire measures

25.5" tall × 8.1" wide

3.23" sidewall on a 19" wheel. 792 revolutions per mile.

205/40R19 means a tire 205 mm wide, with sidewalls 40% as tall as the tire is wide (82 mm), radial construction (R), for a 19 inch wheel.

25.5"19" rim3.2"8.1" wide
205/40R19: 25.5 inches tall, 8.1 inches wide, on a 19 inch rim, drawn to scale

205/40R19 specs

Overall diameter (height)25.46 inches (647 mm)
Section width8.07 inches (205 mm)
Sidewall height3.23 inches (82 mm)
Wheel (rim) diameter19 inches
Circumference80.0 inches (2,031 mm)
Revolutions per mile792
Revolutions per kilometer492
Approximate rim width6.5" to 8.0"
In inches (flotation style)25.5x8.1R19
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 205/40R19 on a 19" wheel

These 19" sizes are within 3% of 205/40R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
235/35R1925.48"9.25"+0.1%60.0 mphCompare
275/30R1925.50"10.83"+0.2%60.1 mphCompare
325/25R1925.40"12.80"−0.2%59.9 mphCompare
335/25R1925.59"13.19"+0.5%60.3 mphCompare
265/30R1925.26"10.43"−0.8%59.5 mphCompare
225/35R1925.20"8.86"−1.0%59.4 mphCompare
315/25R1925.20"12.40"−1.0%59.4 mphCompare
285/30R1925.73"11.22"+1.1%60.6 mphCompare
245/35R1925.75"9.65"+1.2%60.7 mphCompare
215/40R1925.77"8.46"+1.2%60.7 mphCompare
345/25R1925.79"13.58"+1.3%60.8 mphCompare
255/30R1925.02"10.04"−1.7%59.0 mphCompare

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

SizeWheelDiameterDifference
215/50R1717"25.46"0.0%Compare
185/65R1616"25.47"0.0%Compare
195/55R1717"25.44"0.0%Compare
265/55R1414"25.48"+0.1%Compare
265/50R1515"25.43"−0.1%Compare
225/25R2121"25.43"−0.1%Compare
205/65R1515"25.49"+0.1%Compare
275/25R2020"25.41"−0.2%Compare
305/35R1717"25.41"−0.2%Compare
225/70R1313"25.40"−0.2%Compare
235/40R1818"25.40"−0.2%Compare
195/75R1414"25.52"+0.2%Compare

One size up or down

Compare 205/40R19 with another size

With 215/40R19 tires, when your speedometer says 60 mph you are really going

60.7 mph

215/40R19 is +0.31 inches (+1.2%) in overall diameter. That is within the 3% most shops and makers allow.

205/40R19215/40R19Difference%
Overall diameter25.46"25.77"+0.31"+1.2%
Section width8.07"8.46"+0.39"+4.9%
Sidewall height3.23"3.39"+0.16"+4.9%
Circumference79.97"80.96"+0.99"+1.2%
Revolutions per mile792.3782.6−9.7−1.2%

Questions

How tall is a 205/40R19 tire?
A 205/40R19 tire is 25.5 inches tall (647 mm), calculated from the size. It is 8.1 inches wide with 3.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 205/40R19 mean?
205/40R19 means a tire 205 mm wide, with sidewalls 40% as tall as the tire is wide (82 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 205/40R19 tire make?
About 792 revolutions per mile, based on a circumference of 80.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 205/40R19 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 235/35R19 instead of 205/40R19?
235/35R19 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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