325/25R19 tire size in inches

A 325/25R19 tire measures

25.4" tall × 12.8" wide

3.20" sidewall on a 19" wheel. 794 revolutions per mile.

325/25R19 means a tire 325 mm wide, with sidewalls 25% as tall as the tire is wide (81 mm), radial construction (R), for a 19 inch wheel.

25.4"19" rim3.2"12.8" wide
325/25R19: 25.4 inches tall, 12.8 inches wide, on a 19 inch rim, drawn to scale

325/25R19 specs

Overall diameter (height)25.40 inches (645 mm)
Section width12.80 inches (325 mm)
Sidewall height3.20 inches (81 mm)
Wheel (rim) diameter19 inches
Circumference79.8 inches (2,027 mm)
Revolutions per mile794
Revolutions per kilometer493
Approximate rim width10.5" to 12.0"
In inches (flotation style)25.4x12.8R19
Aspect ratio25%

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 325/25R19 on a 19" wheel

These 19" sizes are within 3% of 325/25R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
205/40R1925.46"8.07"+0.2%60.1 mphCompare
235/35R1925.48"9.25"+0.3%60.2 mphCompare
275/30R1925.50"10.83"+0.4%60.2 mphCompare
265/30R1925.26"10.43"−0.5%59.7 mphCompare
335/25R1925.59"13.19"+0.8%60.5 mphCompare
225/35R1925.20"8.86"−0.8%59.5 mphCompare
315/25R1925.20"12.40"−0.8%59.5 mphCompare
285/30R1925.73"11.22"+1.3%60.8 mphCompare
245/35R1925.75"9.65"+1.4%60.8 mphCompare
215/40R1925.77"8.46"+1.5%60.9 mphCompare
255/30R1925.02"10.04"−1.5%59.1 mphCompare
345/25R1925.79"13.58"+1.6%60.9 mphCompare

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

SizeWheelDiameterDifference
165/80R1515"25.39"0.0%Compare
225/70R1313"25.40"0.0%Compare
235/40R1818"25.40"0.0%Compare
305/35R1717"25.41"0.0%Compare
265/45R1616"25.39"0.0%Compare
275/25R2020"25.41"+0.1%Compare
185/85R1313"25.38"−0.1%Compare
225/25R2121"25.43"+0.1%Compare
265/50R1515"25.43"+0.1%Compare
195/55R1717"25.44"+0.2%Compare
265/40R1717"25.35"−0.2%Compare
175/75R1515"25.33"−0.2%Compare

One size up or down

Compare 325/25R19 with another size

With 335/25R19 tires, when your speedometer says 60 mph you are really going

60.5 mph

335/25R19 is +0.20 inches (+0.8%) in overall diameter. That is within the 3% most shops and makers allow.

325/25R19335/25R19Difference%
Overall diameter25.40"25.59"+0.20"+0.8%
Section width12.80"13.19"+0.39"+3.1%
Sidewall height3.20"3.30"+0.10"+3.1%
Circumference79.79"80.41"+0.62"+0.8%
Revolutions per mile794.1788.0−6.1−0.8%

Questions

How tall is a 325/25R19 tire?
A 325/25R19 tire is 25.4 inches tall (645 mm), calculated from the size. It is 12.8 inches wide with 3.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 325/25R19 mean?
325/25R19 means a tire 325 mm wide, with sidewalls 25% as tall as the tire is wide (81 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 325/25R19 tire make?
About 794 revolutions per mile, based on a circumference of 79.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 325/25R19 tire?
Roughly 10.5" to 12.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 205/40R19 instead of 325/25R19?
205/40R19 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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