245/55R19 tire size in inches

A 245/55R19 tire measures

29.6" tall × 9.6" wide

5.31" sidewall on a 19" wheel. 681 revolutions per mile.

245/55R19 means a tire 245 mm wide, with sidewalls 55% as tall as the tire is wide (135 mm), radial construction (R), for a 19 inch wheel.

29.6"19" rim5.3"9.6" wide
245/55R19: 29.6 inches tall, 9.6 inches wide, on a 19 inch rim, drawn to scale

245/55R19 specs

Overall diameter (height)29.61 inches (752 mm)
Section width9.65 inches (245 mm)
Sidewall height5.31 inches (135 mm)
Wheel (rim) diameter19 inches
Circumference93.0 inches (2,363 mm)
Revolutions per mile681
Revolutions per kilometer423
Approximate rim width7.0" to 8.5"
In inches (flotation style)29.6x9.6R19
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 245/55R19 on a 19" wheel

These 19" sizes are within 3% of 245/55R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
225/60R1929.63"8.86"+0.1%60.0 mphCompare
335/40R1929.55"13.19"−0.2%59.9 mphCompare
205/65R1929.49"8.07"−0.4%59.8 mphCompare
295/45R1929.45"11.61"−0.5%59.7 mphCompare
265/50R1929.43"10.43"−0.6%59.6 mphCompare
305/45R1929.81"12.01"+0.7%60.4 mphCompare
275/50R1929.83"10.83"+0.7%60.4 mphCompare
345/40R1929.87"13.58"+0.9%60.5 mphCompare
325/40R1929.24"12.80"−1.3%59.2 mphCompare
215/65R1930.00"8.46"+1.3%60.8 mphCompare
235/55R1929.18"9.25"−1.5%59.1 mphCompare
255/55R1930.04"10.04"+1.5%60.9 mphCompare

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

SizeWheelDiameterDifference
285/25R2424"29.61"0.0%Compare
265/70R1515"29.61"0.0%Compare
305/40R2020"29.61"0.0%Compare
295/50R1818"29.61"0.0%Compare
285/65R1515"29.59"−0.1%Compare
275/35R2222"29.58"−0.1%Compare
245/60R1818"29.57"−0.1%Compare
245/50R2020"29.65"+0.1%Compare
265/75R1414"29.65"+0.1%Compare
265/65R1616"29.56"−0.2%Compare
275/40R2121"29.66"+0.2%Compare
215/80R1616"29.54"−0.2%Compare

One size up or down

Compare 245/55R19 with another size

With 255/55R19 tires, when your speedometer says 60 mph you are really going

60.9 mph

255/55R19 is +0.43 inches (+1.5%) in overall diameter. That is within the 3% most shops and makers allow.

245/55R19255/55R19Difference%
Overall diameter29.61"30.04"+0.43"+1.5%
Section width9.65"10.04"+0.39"+4.1%
Sidewall height5.31"5.52"+0.22"+4.1%
Circumference93.02"94.38"+1.36"+1.5%
Revolutions per mile681.1671.3−9.8−1.4%

Questions

How tall is a 245/55R19 tire?
A 245/55R19 tire is 29.6 inches tall (752 mm), calculated from the size. It is 9.6 inches wide with 5.3 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 245/55R19 mean?
245/55R19 means a tire 245 mm wide, with sidewalls 55% as tall as the tire is wide (135 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 245/55R19 tire make?
About 681 revolutions per mile, based on a circumference of 93.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 245/55R19 tire?
Roughly 7.0" to 8.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 225/60R19 instead of 245/55R19?
225/60R19 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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