325/25R24 tire size in inches

A 325/25R24 tire measures

30.4" tall × 12.8" wide

3.20" sidewall on a 24" wheel. 663 revolutions per mile.

325/25R24 means a tire 325 mm wide, with sidewalls 25% as tall as the tire is wide (81 mm), radial construction (R), for a 24 inch wheel.

30.4"24" rim3.2"12.8" wide
325/25R24: 30.4 inches tall, 12.8 inches wide, on a 24 inch rim, drawn to scale

325/25R24 specs

Overall diameter (height)30.40 inches (772 mm)
Section width12.80 inches (325 mm)
Sidewall height3.20 inches (81 mm)
Wheel (rim) diameter24 inches
Circumference95.5 inches (2,426 mm)
Revolutions per mile663
Revolutions per kilometer412
Approximate rim width10.5" to 12.0"
In inches (flotation style)30.4x12.8R24
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 325/25R24 on a 24" wheel

These 24" sizes are within 3% of 325/25R24's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
275/30R2430.50"10.83"+0.3%60.2 mphCompare
265/30R2430.26"10.43"−0.5%59.7 mphCompare
335/25R2430.59"13.19"+0.6%60.4 mphCompare
315/25R2430.20"12.40"−0.6%59.6 mphCompare
285/30R2430.73"11.22"+1.1%60.7 mphCompare
255/30R2430.02"10.04"−1.2%59.3 mphCompare
345/25R2430.79"13.58"+1.3%60.8 mphCompare
305/25R2430.00"12.01"−1.3%59.2 mphCompare
295/30R2430.97"11.61"+1.9%61.1 mphCompare
355/25R2430.99"13.98"+1.9%61.2 mphCompare
295/25R2429.81"11.61"−1.9%58.8 mphCompare
255/35R2431.03"10.04"+2.1%61.2 mphCompare

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

SizeWheelDiameterDifference
245/85R1414"30.40"0.0%Compare
225/70R1818"30.40"0.0%Compare
315/50R1818"30.40"0.0%Compare
305/35R2222"30.41"0.0%Compare
215/85R1616"30.39"0.0%Compare
265/45R2121"30.39"0.0%Compare
355/30R2222"30.39"0.0%Compare
245/80R1515"30.43"+0.1%Compare
265/50R2020"30.43"+0.1%Compare
265/40R2222"30.35"−0.2%Compare
295/45R2020"30.45"+0.2%Compare
285/55R1818"30.34"−0.2%Compare

One size up or down

Compare 325/25R24 with another size

With 335/25R24 tires, when your speedometer says 60 mph you are really going

60.4 mph

335/25R24 is +0.20 inches (+0.6%) in overall diameter. That is within the 3% most shops and makers allow.

325/25R24335/25R24Difference%
Overall diameter30.40"30.59"+0.20"+0.6%
Section width12.80"13.19"+0.39"+3.1%
Sidewall height3.20"3.30"+0.10"+3.1%
Circumference95.50"96.12"+0.62"+0.6%
Revolutions per mile663.5659.2−4.3−0.6%

Questions

How tall is a 325/25R24 tire?
A 325/25R24 tire is 30.4 inches tall (772 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 325/25R24 mean?
325/25R24 means a tire 325 mm wide, with sidewalls 25% as tall as the tire is wide (81 mm), radial construction (R), for a 24 inch wheel.
How many revolutions per mile does a 325/25R24 tire make?
About 663 revolutions per mile, based on a circumference of 95.5 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 325/25R24 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 275/30R24 instead of 325/25R24?
275/30R24 is +0.10 inches (+0.3%) in overall diameter, so at an indicated 60 mph you would be doing 60.2 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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