175/55R16 tire size in inches

A 175/55R16 tire measures

23.6" tall × 6.9" wide

3.79" sidewall on a 16" wheel. 855 revolutions per mile.

175/55R16 means a tire 175 mm wide, with sidewalls 55% as tall as the tire is wide (96 mm), radial construction (R), for a 16 inch wheel.

23.6"16" rim3.8"6.9" wide
175/55R16: 23.6 inches tall, 6.9 inches wide, on a 16 inch rim, drawn to scale

175/55R16 specs

Overall diameter (height)23.58 inches (599 mm)
Section width6.89 inches (175 mm)
Sidewall height3.79 inches (96 mm)
Wheel (rim) diameter16 inches
Circumference74.1 inches (1,881 mm)
Revolutions per mile855
Revolutions per kilometer531
Approximate rim width5.0" to 6.5"
In inches (flotation style)23.6x6.9R16
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 175/55R16 on a 16" wheel

These 16" sizes are within 3% of 175/55R16's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
215/45R1623.62"8.46"+0.2%60.1 mphCompare
195/50R1623.68"7.68"+0.4%60.3 mphCompare
245/40R1623.72"9.65"+0.6%60.4 mphCompare
235/40R1623.40"9.25"−0.8%59.5 mphCompare
185/50R1623.28"7.28"−1.3%59.2 mphCompare
205/45R1623.26"8.07"−1.3%59.2 mphCompare
225/45R1623.97"8.86"+1.7%61.0 mphCompare
185/55R1624.01"7.28"+1.8%61.1 mphCompare
255/40R1624.03"10.04"+1.9%61.2 mphCompare
205/50R1624.07"8.07"+2.1%61.3 mphCompare
225/40R1623.09"8.86"−2.1%58.7 mphCompare
195/45R1622.91"7.68"−2.8%58.3 mphCompare

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

SizeWheelDiameterDifference
185/45R1717"23.56"−0.1%Compare
235/25R1919"23.63"+0.2%Compare
225/60R1313"23.63"+0.2%Compare
175/70R1414"23.65"+0.3%Compare
205/35R1818"23.65"+0.3%Compare
205/65R1313"23.49"−0.4%Compare
235/35R1717"23.48"−0.4%Compare
245/45R1515"23.68"+0.4%Compare
205/60R1414"23.69"+0.5%Compare
185/65R1414"23.47"−0.5%Compare
215/50R1515"23.46"−0.5%Compare
205/40R1717"23.46"−0.5%Compare

One size up or down

Compare 175/55R16 with another size

With 185/55R16 tires, when your speedometer says 60 mph you are really going

61.1 mph

185/55R16 is +0.43 inches (+1.8%) in overall diameter. That is within the 3% most shops and makers allow.

175/55R16185/55R16Difference%
Overall diameter23.58"24.01"+0.43"+1.8%
Section width6.89"7.28"+0.39"+5.7%
Sidewall height3.79"4.01"+0.22"+5.7%
Circumference74.07"75.44"+1.36"+1.8%
Revolutions per mile855.4839.9−15.4−1.8%

Questions

How tall is a 175/55R16 tire?
A 175/55R16 tire is 23.6 inches tall (599 mm), calculated from the size. It is 6.9 inches wide with 3.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 175/55R16 mean?
175/55R16 means a tire 175 mm wide, with sidewalls 55% as tall as the tire is wide (96 mm), radial construction (R), for a 16 inch wheel.
How many revolutions per mile does a 175/55R16 tire make?
About 855 revolutions per mile, based on a circumference of 74.1 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 175/55R16 tire?
Roughly 5.0" to 6.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 215/45R16 instead of 175/55R16?
215/45R16 is +0.04 inches (+0.2%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

Browse