325/50R19 tire size in inches

A 325/50R19 tire measures

31.8" tall × 12.8" wide

6.40" sidewall on a 19" wheel. 634 revolutions per mile.

325/50R19 means a tire 325 mm wide, with sidewalls 50% as tall as the tire is wide (163 mm), radial construction (R), for a 19 inch wheel.

31.8"19" rim6.4"12.8" wide
325/50R19: 31.8 inches tall, 12.8 inches wide, on a 19 inch rim, drawn to scale

325/50R19 specs

Overall diameter (height)31.80 inches (808 mm)
Section width12.80 inches (325 mm)
Sidewall height6.40 inches (163 mm)
Wheel (rim) diameter19 inches
Circumference99.9 inches (2,537 mm)
Revolutions per mile634
Revolutions per kilometer394
Approximate rim width9.5" to 11.0"
In inches (flotation style)31.8x12.8R19
Aspect ratio50%

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 325/50R19 on a 19" wheel

These 19" sizes are within 3% of 325/50R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
295/55R1931.78"11.61"−0.1%60.0 mphCompare
275/60R1931.99"10.83"+0.6%60.4 mphCompare
355/45R1931.58"13.98"−0.7%59.6 mphCompare
245/65R1931.54"9.65"−0.8%59.5 mphCompare
255/65R1932.05"10.04"+0.8%60.5 mphCompare
265/60R1931.52"10.43"−0.9%59.5 mphCompare
315/50R1931.40"12.40"−1.2%59.3 mphCompare
335/50R1932.19"13.19"+1.2%60.7 mphCompare
305/55R1932.21"12.01"+1.3%60.8 mphCompare
285/55R1931.34"11.22"−1.4%59.1 mphCompare
345/45R1931.22"13.58"−1.8%58.9 mphCompare
285/60R1932.46"11.22"+2.1%61.3 mphCompare

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

SizeWheelDiameterDifference
305/45R2121"31.81"0.0%Compare
355/35R2222"31.78"0.0%Compare
275/50R2121"31.83"+0.1%Compare
285/75R1515"31.83"+0.1%Compare
275/45R2222"31.74"−0.2%Compare
265/85R1414"31.74"−0.2%Compare
285/35R2424"31.85"+0.2%Compare
235/85R1616"31.73"−0.2%Compare
345/40R2121"31.87"+0.2%Compare
335/45R2020"31.87"+0.2%Compare
235/75R1818"31.88"+0.3%Compare
285/70R1616"31.71"−0.3%Compare

One size up or down

Compare 325/50R19 with another size

With 335/50R19 tires, when your speedometer says 60 mph you are really going

60.7 mph

335/50R19 is +0.39 inches (+1.2%) in overall diameter. That is within the 3% most shops and makers allow.

325/50R19335/50R19Difference%
Overall diameter31.80"32.19"+0.39"+1.2%
Section width12.80"13.19"+0.39"+3.1%
Sidewall height6.40"6.59"+0.20"+3.1%
Circumference99.89"101.12"+1.24"+1.2%
Revolutions per mile634.3626.6−7.8−1.2%

Questions

How tall is a 325/50R19 tire?
A 325/50R19 tire is 31.8 inches tall (808 mm), calculated from the size. It is 12.8 inches wide with 6.4 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 325/50R19 mean?
325/50R19 means a tire 325 mm wide, with sidewalls 50% as tall as the tire is wide (163 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 325/50R19 tire make?
About 634 revolutions per mile, based on a circumference of 99.9 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 325/50R19 tire?
Roughly 9.5" to 11.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 295/55R19 instead of 325/50R19?
295/55R19 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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