235/30R19 tire size in inches

A 235/30R19 tire measures

24.6" tall × 9.3" wide

2.78" sidewall on a 19" wheel. 821 revolutions per mile.

235/30R19 means a tire 235 mm wide, with sidewalls 30% as tall as the tire is wide (71 mm), radial construction (R), for a 19 inch wheel.

24.6"19" rim2.8"9.3" wide
235/30R19: 24.6 inches tall, 9.3 inches wide, on a 19 inch rim, drawn to scale

235/30R19 specs

Overall diameter (height)24.55 inches (624 mm)
Section width9.25 inches (235 mm)
Sidewall height2.78 inches (71 mm)
Wheel (rim) diameter19 inches
Circumference77.1 inches (1,959 mm)
Revolutions per mile821
Revolutions per kilometer510
Approximate rim width7.5" to 9.0"
In inches (flotation style)24.6x9.3R19
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 235/30R19 on a 19" wheel

These 19" sizes are within 3% of 235/30R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
285/25R1924.61"11.22"+0.2%60.1 mphCompare
205/35R1924.65"8.07"+0.4%60.2 mphCompare
275/25R1924.41"10.83"−0.6%59.7 mphCompare
225/30R1924.31"8.86"−1.0%59.4 mphCompare
245/30R1924.79"9.65"+1.0%60.6 mphCompare
295/25R1924.81"11.61"+1.0%60.6 mphCompare
265/25R1924.22"10.43"−1.4%59.2 mphCompare
215/35R1924.93"8.46"+1.5%60.9 mphCompare
305/25R1925.00"12.01"+1.8%61.1 mphCompare
215/30R1924.08"8.46"−1.9%58.8 mphCompare
255/30R1925.02"10.04"+1.9%61.2 mphCompare
255/25R1924.02"10.04"−2.2%58.7 mphCompare

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

SizeWheelDiameterDifference
245/60R1313"24.57"+0.1%Compare
275/35R1717"24.58"+0.1%Compare
195/75R1313"24.52"−0.1%Compare
225/65R1313"24.52"−0.1%Compare
205/65R1414"24.49"−0.2%Compare
245/55R1414"24.61"+0.2%Compare
215/45R1717"24.62"+0.3%Compare
235/35R1818"24.48"−0.3%Compare
235/25R2020"24.63"+0.3%Compare
225/60R1414"24.63"+0.3%Compare
185/65R1515"24.47"−0.3%Compare
215/50R1616"24.46"−0.4%Compare

One size up or down

Compare 235/30R19 with another size

With 245/30R19 tires, when your speedometer says 60 mph you are really going

60.6 mph

245/30R19 is +0.24 inches (+1.0%) in overall diameter. That is within the 3% most shops and makers allow.

235/30R19245/30R19Difference%
Overall diameter24.55"24.79"+0.24"+1.0%
Section width9.25"9.65"+0.39"+4.3%
Sidewall height2.78"2.89"+0.12"+4.3%
Circumference77.13"77.87"+0.74"+1.0%
Revolutions per mile821.5813.6−7.8−1.0%

Questions

How tall is a 235/30R19 tire?
A 235/30R19 tire is 24.6 inches tall (624 mm), calculated from the size. It is 9.3 inches wide with 2.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 235/30R19 mean?
235/30R19 means a tire 235 mm wide, with sidewalls 30% as tall as the tire is wide (71 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 235/30R19 tire make?
About 821 revolutions per mile, based on a circumference of 77.1 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 235/30R19 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 285/25R19 instead of 235/30R19?
285/25R19 is +0.06 inches (+0.2%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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