275/40R24 tire size in inches

A 275/40R24 tire measures

32.7" tall × 10.8" wide

4.33" sidewall on a 24" wheel. 617 revolutions per mile.

275/40R24 means a tire 275 mm wide, with sidewalls 40% as tall as the tire is wide (110 mm), radial construction (R), for a 24 inch wheel.

32.7"24" rim4.3"10.8" wide
275/40R24: 32.7 inches tall, 10.8 inches wide, on a 24 inch rim, drawn to scale

275/40R24 specs

Overall diameter (height)32.66 inches (830 mm)
Section width10.83 inches (275 mm)
Sidewall height4.33 inches (110 mm)
Wheel (rim) diameter24 inches
Circumference102.6 inches (2,606 mm)
Revolutions per mile617
Revolutions per kilometer384
Approximate rim width9.0" to 10.5"
In inches (flotation style)32.7x10.8R24
Aspect ratio40%

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 275/40R24 on a 24" wheel

These 24" sizes are within 3% of 275/40R24's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
315/35R2432.68"12.40"+0.1%60.0 mphCompare
305/35R2432.41"12.01"−0.8%59.5 mphCompare
355/30R2432.39"13.98"−0.8%59.5 mphCompare
325/35R2432.96"12.80"+0.9%60.5 mphCompare
265/40R2432.35"10.43"−1.0%59.4 mphCompare
285/40R2432.98"11.22"+1.0%60.6 mphCompare
345/30R2432.15"13.58"−1.6%59.1 mphCompare
295/35R2432.13"11.61"−1.6%59.0 mphCompare
335/35R2433.23"13.19"+1.7%61.0 mphCompare
255/40R2432.03"10.04"−1.9%58.8 mphCompare
295/40R2433.29"11.61"+1.9%61.2 mphCompare
335/30R2431.91"13.19"−2.3%58.6 mphCompare

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

SizeWheelDiameterDifference
265/75R1717"32.65"0.0%Compare
315/55R1919"32.64"−0.1%Compare
265/80R1616"32.69"+0.1%Compare
295/50R2121"32.61"−0.1%Compare
285/70R1717"32.71"+0.1%Compare
245/55R2222"32.61"−0.2%Compare
305/65R1717"32.61"−0.2%Compare
265/70R1818"32.61"−0.2%Compare
285/65R1818"32.59"−0.2%Compare
265/85R1515"32.74"+0.2%Compare
345/50R1919"32.58"−0.2%Compare
355/45R2020"32.58"−0.3%Compare

One size up or down

Compare 275/40R24 with another size

With 285/40R24 tires, when your speedometer says 60 mph you are really going

60.6 mph

285/40R24 is +0.31 inches (+1.0%) in overall diameter. That is within the 3% most shops and makers allow.

275/40R24285/40R24Difference%
Overall diameter32.66"32.98"+0.31"+1.0%
Section width10.83"11.22"+0.39"+3.6%
Sidewall height4.33"4.49"+0.16"+3.6%
Circumference102.61"103.60"+0.99"+1.0%
Revolutions per mile617.5611.6−5.9−1.0%

Questions

How tall is a 275/40R24 tire?
A 275/40R24 tire is 32.7 inches tall (830 mm), calculated from the size. It is 10.8 inches wide with 4.3 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 275/40R24 mean?
275/40R24 means a tire 275 mm wide, with sidewalls 40% as tall as the tire is wide (110 mm), radial construction (R), for a 24 inch wheel.
How many revolutions per mile does a 275/40R24 tire make?
About 617 revolutions per mile, based on a circumference of 102.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 275/40R24 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 315/35R24 instead of 275/40R24?
315/35R24 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.

Browse