275/30R19 tire size in inches

A 275/30R19 tire measures

25.5" tall × 10.8" wide

3.25" sidewall on a 19" wheel. 791 revolutions per mile.

275/30R19 means a tire 275 mm wide, with sidewalls 30% as tall as the tire is wide (83 mm), radial construction (R), for a 19 inch wheel.

25.5"19" rim3.2"10.8" wide
275/30R19: 25.5 inches tall, 10.8 inches wide, on a 19 inch rim, drawn to scale

275/30R19 specs

Overall diameter (height)25.50 inches (648 mm)
Section width10.83 inches (275 mm)
Sidewall height3.25 inches (83 mm)
Wheel (rim) diameter19 inches
Circumference80.1 inches (2,034 mm)
Revolutions per mile791
Revolutions per kilometer492
Approximate rim width9.0" to 10.5"
In inches (flotation style)25.5x10.8R19
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 275/30R19 on a 19" wheel

These 19" sizes are within 3% of 275/30R19'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
205/40R1925.46"8.07"−0.2%59.9 mphCompare
325/25R1925.40"12.80"−0.4%59.8 mphCompare
335/25R1925.59"13.19"+0.4%60.2 mphCompare
265/30R1925.26"10.43"−0.9%59.4 mphCompare
285/30R1925.73"11.22"+0.9%60.6 mphCompare
245/35R1925.75"9.65"+1.0%60.6 mphCompare
215/40R1925.77"8.46"+1.1%60.6 mphCompare
225/35R1925.20"8.86"−1.2%59.3 mphCompare
315/25R1925.20"12.40"−1.2%59.3 mphCompare
345/25R1925.79"13.58"+1.2%60.7 mphCompare
255/30R1925.02"10.04"−1.9%58.9 mphCompare

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

SizeWheelDiameterDifference
205/65R1515"25.49"0.0%Compare
195/75R1414"25.52"+0.1%Compare
225/65R1414"25.52"+0.1%Compare
265/55R1414"25.48"−0.1%Compare
185/65R1616"25.47"−0.1%Compare
215/50R1717"25.46"−0.1%Compare
245/65R1313"25.54"+0.2%Compare
195/55R1717"25.44"−0.2%Compare
235/30R2020"25.55"+0.2%Compare
265/50R1515"25.43"−0.2%Compare
225/25R2121"25.43"−0.3%Compare
245/60R1414"25.57"+0.3%Compare

One size up or down

Compare 275/30R19 with another size

With 285/30R19 tires, when your speedometer says 60 mph you are really going

60.6 mph

285/30R19 is +0.24 inches (+0.9%) in overall diameter. That is within the 3% most shops and makers allow.

275/30R19285/30R19Difference%
Overall diameter25.50"25.73"+0.24"+0.9%
Section width10.83"11.22"+0.39"+3.6%
Sidewall height3.25"3.37"+0.12"+3.6%
Circumference80.10"80.84"+0.74"+0.9%
Revolutions per mile791.0783.8−7.3−0.9%

Questions

How tall is a 275/30R19 tire?
A 275/30R19 tire is 25.5 inches tall (648 mm), calculated from the size. It is 10.8 inches wide with 3.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 275/30R19 mean?
275/30R19 means a tire 275 mm wide, with sidewalls 30% as tall as the tire is wide (83 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 275/30R19 tire make?
About 791 revolutions per mile, based on a circumference of 80.1 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 275/30R19 tire?
Roughly 9.0" to 10.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 235/35R19 instead of 275/30R19?
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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