235/55R14 tire size in inches

A 235/55R14 tire measures

24.2" tall × 9.3" wide

5.09" sidewall on a 14" wheel. 834 revolutions per mile.

235/55R14 means a tire 235 mm wide, with sidewalls 55% as tall as the tire is wide (129 mm), radial construction (R), for a 14 inch wheel.

24.2"14" rim5.1"9.3" wide
235/55R14: 24.2 inches tall, 9.3 inches wide, on a 14 inch rim, drawn to scale

235/55R14 specs

Overall diameter (height)24.18 inches (614 mm)
Section width9.25 inches (235 mm)
Sidewall height5.09 inches (129 mm)
Wheel (rim) diameter14 inches
Circumference76.0 inches (1,929 mm)
Revolutions per mile834
Revolutions per kilometer518
Approximate rim width6.5" to 8.0"
In inches (flotation style)24.2x9.3R14
Aspect ratio55%

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 235/55R14 on a 14" wheel

These 14" sizes are within 3% of 235/55R14's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
185/70R1424.20"7.28"+0.1%60.0 mphCompare
215/60R1424.16"8.46"−0.1%60.0 mphCompare
175/75R1424.33"6.89"+0.7%60.4 mphCompare
155/85R1424.37"6.10"+0.8%60.5 mphCompare
195/65R1423.98"7.68"−0.8%59.5 mphCompare
165/80R1424.39"6.50"+0.9%60.5 mphCompare
205/65R1424.49"8.07"+1.3%60.8 mphCompare
155/80R1423.76"6.10"−1.7%59.0 mphCompare
245/55R1424.61"9.65"+1.8%61.1 mphCompare
165/75R1423.74"6.50"−1.8%58.9 mphCompare
225/55R1423.74"8.86"−1.8%58.9 mphCompare
225/60R1424.63"8.86"+1.9%61.1 mphCompare

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

SizeWheelDiameterDifference
225/35R1818"24.20"+0.1%Compare
195/60R1515"24.21"+0.1%Compare
195/40R1818"24.14"−0.1%Compare
265/25R1919"24.22"+0.2%Compare
215/25R2020"24.23"+0.2%Compare
235/50R1515"24.25"+0.3%Compare
235/60R1313"24.10"−0.3%Compare
165/70R1515"24.09"−0.3%Compare
205/45R1717"24.26"+0.4%Compare
175/60R1616"24.27"+0.4%Compare
225/40R1717"24.09"−0.4%Compare
215/30R1919"24.08"−0.4%Compare

One size up or down

Compare 235/55R14 with another size

With 245/55R14 tires, when your speedometer says 60 mph you are really going

61.1 mph

245/55R14 is +0.43 inches (+1.8%) in overall diameter. That is within the 3% most shops and makers allow.

235/55R14245/55R14Difference%
Overall diameter24.18"24.61"+0.43"+1.8%
Section width9.25"9.65"+0.39"+4.3%
Sidewall height5.09"5.31"+0.22"+4.3%
Circumference75.95"77.32"+1.36"+1.8%
Revolutions per mile834.2819.5−14.7−1.8%

Questions

How tall is a 235/55R14 tire?
A 235/55R14 tire is 24.2 inches tall (614 mm), calculated from the size. It is 9.3 inches wide with 5.1 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 235/55R14 mean?
235/55R14 means a tire 235 mm wide, with sidewalls 55% as tall as the tire is wide (129 mm), radial construction (R), for a 14 inch wheel.
How many revolutions per mile does a 235/55R14 tire make?
About 834 revolutions per mile, based on a circumference of 76.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 235/55R14 tire?
Roughly 6.5" to 8.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 185/70R14 instead of 235/55R14?
185/70R14 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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