305/35R24 tire size in inches

A 305/35R24 tire measures

32.4" tall × 12.0" wide

4.20" sidewall on a 24" wheel. 622 revolutions per mile.

305/35R24 means a tire 305 mm wide, with sidewalls 35% as tall as the tire is wide (107 mm), radial construction (R), for a 24 inch wheel.

32.4"24" rim4.2"12.0" wide
305/35R24: 32.4 inches tall, 12.0 inches wide, on a 24 inch rim, drawn to scale

305/35R24 specs

Overall diameter (height)32.41 inches (823 mm)
Section width12.01 inches (305 mm)
Sidewall height4.20 inches (107 mm)
Wheel (rim) diameter24 inches
Circumference101.8 inches (2,586 mm)
Revolutions per mile622
Revolutions per kilometer387
Approximate rim width10.0" to 11.5"
In inches (flotation style)32.4x12.0R24
Aspect ratio35%

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 305/35R24 on a 24" wheel

These 24" sizes are within 3% of 305/35R24's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
355/30R2432.39"13.98"−0.1%60.0 mphCompare
265/40R2432.35"10.43"−0.2%59.9 mphCompare
275/40R2432.66"10.83"+0.8%60.5 mphCompare
345/30R2432.15"13.58"−0.8%59.5 mphCompare
295/35R2432.13"11.61"−0.9%59.5 mphCompare
315/35R2432.68"12.40"+0.9%60.5 mphCompare
255/40R2432.03"10.04"−1.2%59.3 mphCompare
335/30R2431.91"13.19"−1.5%59.1 mphCompare
285/35R2431.85"11.22"−1.7%59.0 mphCompare
325/35R2432.96"12.80"+1.7%61.0 mphCompare
285/40R2432.98"11.22"+1.8%61.1 mphCompare
325/30R2431.68"12.80"−2.2%58.7 mphCompare

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

SizeWheelDiameterDifference
305/60R1818"32.41"0.0%Compare
315/50R2020"32.40"0.0%Compare
245/85R1616"32.40"0.0%Compare
265/50R2222"32.43"+0.1%Compare
295/45R2222"32.45"+0.1%Compare
285/60R1919"32.46"+0.2%Compare
245/75R1818"32.47"+0.2%Compare
285/55R2020"32.34"−0.2%Compare
265/55R2121"32.48"+0.2%Compare
275/80R1515"32.32"−0.3%Compare
335/55R1818"32.51"+0.3%Compare
325/45R2121"32.52"+0.3%Compare

One size up or down

Compare 305/35R24 with another size

With 315/35R24 tires, when your speedometer says 60 mph you are really going

60.5 mph

315/35R24 is +0.28 inches (+0.9%) in overall diameter. That is within the 3% most shops and makers allow.

305/35R24315/35R24Difference%
Overall diameter32.41"32.68"+0.28"+0.9%
Section width12.01"12.40"+0.39"+3.3%
Sidewall height4.20"4.34"+0.14"+3.3%
Circumference101.80"102.67"+0.87"+0.9%
Revolutions per mile622.4617.1−5.2−0.8%

Questions

How tall is a 305/35R24 tire?
A 305/35R24 tire is 32.4 inches tall (823 mm), calculated from the size. It is 12.0 inches wide with 4.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 305/35R24 mean?
305/35R24 means a tire 305 mm wide, with sidewalls 35% as tall as the tire is wide (107 mm), radial construction (R), for a 24 inch wheel.
How many revolutions per mile does a 305/35R24 tire make?
About 622 revolutions per mile, based on a circumference of 101.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 305/35R24 tire?
Roughly 10.0" to 11.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 355/30R24 instead of 305/35R24?
355/30R24 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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