205/80R15 tire size in inches

A 205/80R15 tire measures

27.9" tall × 8.1" wide

6.46" sidewall on a 15" wheel. 723 revolutions per mile.

205/80R15 means a tire 205 mm wide, with sidewalls 80% as tall as the tire is wide (164 mm), radial construction (R), for a 15 inch wheel.

27.9"15" rim6.5"8.1" wide
205/80R15: 27.9 inches tall, 8.1 inches wide, on a 15 inch rim, drawn to scale

205/80R15 specs

Overall diameter (height)27.91 inches (709 mm)
Section width8.07 inches (205 mm)
Sidewall height6.46 inches (164 mm)
Wheel (rim) diameter15 inches
Circumference87.7 inches (2,227 mm)
Revolutions per mile723
Revolutions per kilometer449
Approximate rim width5.5" to 7.0"
In inches (flotation style)27.9x8.1R15
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 205/80R15 on a 15" wheel

These 15" sizes are within 3% of 205/80R15's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
235/70R1527.95"9.25"+0.1%60.1 mphCompare
275/60R1527.99"10.83"+0.3%60.2 mphCompare
195/85R1528.05"7.68"+0.5%60.3 mphCompare
255/65R1528.05"10.04"+0.5%60.3 mphCompare
215/75R1527.70"8.46"−0.8%59.5 mphCompare
225/75R1528.29"8.86"+1.3%60.8 mphCompare
245/65R1527.54"9.65"−1.3%59.2 mphCompare
265/60R1527.52"10.43"−1.4%59.2 mphCompare
225/70R1527.40"8.86"−1.8%58.9 mphCompare
185/85R1527.38"7.28"−1.9%58.9 mphCompare
285/60R1528.46"11.22"+2.0%61.2 mphCompare
285/55R1527.34"11.22"−2.0%58.8 mphCompare

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

SizeWheelDiameterDifference
335/30R2020"27.91"0.0%Compare
275/55R1616"27.91"0.0%Compare
315/40R1818"27.92"0.0%Compare
185/75R1717"27.93"0.0%Compare
205/55R1919"27.88"−0.1%Compare
235/75R1414"27.88"−0.1%Compare
325/35R1919"27.96"+0.2%Compare
225/50R1919"27.86"−0.2%Compare
295/30R2121"27.97"+0.2%Compare
285/35R2020"27.85"−0.2%Compare
225/45R2020"27.97"+0.2%Compare
215/70R1616"27.85"−0.2%Compare

One size up or down

Compare 205/80R15 with another size

With 215/80R15 tires, when your speedometer says 60 mph you are really going

61.4 mph

215/80R15 is +0.63 inches (+2.3%) in overall diameter. That is within the 3% most shops and makers allow.

205/80R15215/80R15Difference%
Overall diameter27.91"28.54"+0.63"+2.3%
Section width8.07"8.46"+0.39"+4.9%
Sidewall height6.46"6.77"+0.31"+4.9%
Circumference87.69"89.67"+1.98"+2.3%
Revolutions per mile722.5706.6−15.9−2.2%

Questions

How tall is a 205/80R15 tire?
A 205/80R15 tire is 27.9 inches tall (709 mm), calculated from the size. It is 8.1 inches wide with 6.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 205/80R15 mean?
205/80R15 means a tire 205 mm wide, with sidewalls 80% as tall as the tire is wide (164 mm), radial construction (R), for a 15 inch wheel.
How many revolutions per mile does a 205/80R15 tire make?
About 723 revolutions per mile, based on a circumference of 87.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 205/80R15 tire?
Roughly 5.5" to 7.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 235/70R15 instead of 205/80R15?
235/70R15 is +0.04 inches (+0.1%) 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.

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