185/80R16 tire size in inches

A 185/80R16 tire measures

27.7" tall × 7.3" wide

5.83" sidewall on a 16" wheel. 729 revolutions per mile.

185/80R16 means a tire 185 mm wide, with sidewalls 80% as tall as the tire is wide (148 mm), radial construction (R), for a 16 inch wheel.

27.7"16" rim5.8"7.3" wide
185/80R16: 27.7 inches tall, 7.3 inches wide, on a 16 inch rim, drawn to scale

185/80R16 specs

Overall diameter (height)27.65 inches (702 mm)
Section width7.28 inches (185 mm)
Sidewall height5.83 inches (148 mm)
Wheel (rim) diameter16 inches
Circumference86.9 inches (2,207 mm)
Revolutions per mile729
Revolutions per kilometer453
Approximate rim width5.0" to 6.5"
In inches (flotation style)27.7x7.3R16
Aspect ratio80%

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 185/80R16 on a 16" wheel

These 16" sizes are within 3% of 185/80R16's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
295/50R1627.61"11.61"−0.1%59.9 mphCompare
175/85R1627.71"6.89"+0.2%60.1 mphCompare
245/60R1627.57"9.65"−0.3%59.8 mphCompare
195/75R1627.52"7.68"−0.5%59.7 mphCompare
225/65R1627.52"8.86"−0.5%59.7 mphCompare
265/55R1627.48"10.43"−0.6%59.6 mphCompare
215/70R1627.85"8.46"+0.7%60.4 mphCompare
275/55R1627.91"10.83"+0.9%60.6 mphCompare
205/70R1627.30"8.07"−1.3%59.2 mphCompare
235/65R1628.03"9.25"+1.4%60.8 mphCompare
255/60R1628.05"10.04"+1.4%60.9 mphCompare
285/50R1627.22"11.22"−1.6%59.1 mphCompare

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

SizeWheelDiameterDifference
245/50R1818"27.65"0.0%Compare
275/40R1919"27.66"0.0%Compare
225/60R1717"27.63"−0.1%Compare
325/30R2020"27.68"+0.1%Compare
245/45R1919"27.68"+0.1%Compare
315/35R1919"27.68"+0.1%Compare
205/60R1818"27.69"+0.1%Compare
215/45R2020"27.62"−0.1%Compare
215/75R1515"27.70"+0.2%Compare
245/55R1717"27.61"−0.2%Compare
285/25R2222"27.61"−0.2%Compare
305/40R1818"27.61"−0.2%Compare

One size up or down

Compare 185/80R16 with another size

With 195/80R16 tires, when your speedometer says 60 mph you are really going

61.4 mph

195/80R16 is +0.63 inches (+2.3%) in overall diameter. That is within the 3% most shops and makers allow.

185/80R16195/80R16Difference%
Overall diameter27.65"28.28"+0.63"+2.3%
Section width7.28"7.68"+0.39"+5.4%
Sidewall height5.83"6.14"+0.31"+5.4%
Circumference86.88"88.86"+1.98"+2.3%
Revolutions per mile729.3713.1−16.2−2.2%

Questions

How tall is a 185/80R16 tire?
A 185/80R16 tire is 27.7 inches tall (702 mm), calculated from the size. It is 7.3 inches wide with 5.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 185/80R16 mean?
185/80R16 means a tire 185 mm wide, with sidewalls 80% as tall as the tire is wide (148 mm), radial construction (R), for a 16 inch wheel.
How many revolutions per mile does a 185/80R16 tire make?
About 729 revolutions per mile, based on a circumference of 86.9 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 185/80R16 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 295/50R16 instead of 185/80R16?
295/50R16 is −0.04 inches (−0.1%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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