225/55R14 tire size in inches

A 225/55R14 tire measures

23.7" tall × 8.9" wide

4.87" sidewall on a 14" wheel. 849 revolutions per mile.

225/55R14 means a tire 225 mm wide, with sidewalls 55% as tall as the tire is wide (124 mm), radial construction (R), for a 14 inch wheel.

23.7"14" rim4.9"8.9" wide
225/55R14: 23.7 inches tall, 8.9 inches wide, on a 14 inch rim, drawn to scale

225/55R14 specs

Overall diameter (height)23.74 inches (603 mm)
Section width8.86 inches (225 mm)
Sidewall height4.87 inches (124 mm)
Wheel (rim) diameter14 inches
Circumference74.6 inches (1,895 mm)
Revolutions per mile849
Revolutions per kilometer528
Approximate rim width6.5" to 8.0"
In inches (flotation style)23.7x8.9R14
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 225/55R14 on a 14" wheel

These 14" sizes are within 3% of 225/55R14's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
165/75R1423.74"6.50"0.0%60.0 mphCompare
155/80R1423.76"6.10"+0.1%60.0 mphCompare
205/60R1423.69"8.07"−0.2%59.9 mphCompare
175/70R1423.65"6.89"−0.4%59.8 mphCompare
195/65R1423.98"7.68"+1.0%60.6 mphCompare
185/65R1423.47"7.28"−1.2%59.3 mphCompare
215/60R1424.16"8.46"+1.7%61.0 mphCompare
215/55R1423.31"8.46"−1.8%58.9 mphCompare
235/55R1424.18"9.25"+1.8%61.1 mphCompare
185/70R1424.20"7.28"+1.9%61.1 mphCompare
195/60R1423.21"7.68"−2.2%58.7 mphCompare
155/75R1423.15"6.10"−2.5%58.5 mphCompare

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

SizeWheelDiameterDifference
185/60R1515"23.74"0.0%Compare
195/70R1313"23.75"0.0%Compare
245/35R1717"23.75"0.0%Compare
215/40R1717"23.77"+0.1%Compare
245/40R1616"23.72"−0.1%Compare
245/45R1515"23.68"−0.3%Compare
195/50R1616"23.68"−0.3%Compare
245/25R1919"23.82"+0.3%Compare
205/35R1818"23.65"−0.4%Compare
205/30R1919"23.84"+0.4%Compare
225/50R1515"23.86"+0.5%Compare
225/60R1313"23.63"−0.5%Compare

One size up or down

Compare 225/55R14 with another size

With 235/55R14 tires, when your speedometer says 60 mph you are really going

61.1 mph

235/55R14 is +0.43 inches (+1.8%) in overall diameter. That is within the 3% most shops and makers allow.

225/55R14235/55R14Difference%
Overall diameter23.74"24.18"+0.43"+1.8%
Section width8.86"9.25"+0.39"+4.4%
Sidewall height4.87"5.09"+0.22"+4.4%
Circumference74.59"75.95"+1.36"+1.8%
Revolutions per mile849.4834.2−15.2−1.8%

Questions

How tall is a 225/55R14 tire?
A 225/55R14 tire is 23.7 inches tall (603 mm), calculated from the size. It is 8.9 inches wide with 4.9 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 225/55R14 mean?
225/55R14 means a tire 225 mm wide, with sidewalls 55% as tall as the tire is wide (124 mm), radial construction (R), for a 14 inch wheel.
How many revolutions per mile does a 225/55R14 tire make?
About 849 revolutions per mile, based on a circumference of 74.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 225/55R14 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 165/75R14 instead of 225/55R14?
165/75R14 is 0.00 inches (0.0%) 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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