205/75R15 tire size in inches

A 205/75R15 tire measures

27.1" tall × 8.1" wide

6.05" sidewall on a 15" wheel. 744 revolutions per mile.

205/75R15 means a tire 205 mm wide, with sidewalls 75% as tall as the tire is wide (154 mm), radial construction (R), for a 15 inch wheel.

27.1"15" rim6.1"8.1" wide
205/75R15: 27.1 inches tall, 8.1 inches wide, on a 15 inch rim, drawn to scale

205/75R15 specs

Overall diameter (height)27.11 inches (689 mm)
Section width8.07 inches (205 mm)
Sidewall height6.05 inches (154 mm)
Wheel (rim) diameter15 inches
Circumference85.2 inches (2,163 mm)
Revolutions per mile744
Revolutions per kilometer462
Approximate rim width5.5" to 7.0"
In inches (flotation style)27.1x8.1R15
Aspect ratio75%

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 205/75R15 on a 15" wheel

These 15" sizes are within 3% of 205/75R15's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
255/60R1527.05"10.04"−0.2%59.9 mphCompare
235/65R1527.03"9.25"−0.3%59.8 mphCompare
195/80R1527.28"7.68"+0.7%60.4 mphCompare
275/55R1526.91"10.83"−0.7%59.6 mphCompare
285/55R1527.34"11.22"+0.9%60.5 mphCompare
215/70R1526.85"8.46"−0.9%59.4 mphCompare
185/85R1527.38"7.28"+1.0%60.6 mphCompare
225/70R1527.40"8.86"+1.1%60.7 mphCompare
175/85R1526.71"6.89"−1.5%59.1 mphCompare
265/60R1527.52"10.43"+1.5%60.9 mphCompare
245/65R1527.54"9.65"+1.6%61.0 mphCompare
185/80R1526.65"7.28"−1.7%59.0 mphCompare

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

SizeWheelDiameterDifference
235/60R1616"27.10"0.0%Compare
285/45R1717"27.10"0.0%Compare
225/40R2020"27.09"−0.1%Compare
295/35R1919"27.13"+0.1%Compare
205/50R1919"27.07"−0.1%Compare
345/30R1919"27.15"+0.2%Compare
215/60R1717"27.16"+0.2%Compare
195/85R1414"27.05"−0.2%Compare
255/65R1414"27.05"−0.2%Compare
255/55R1616"27.04"−0.2%Compare
225/80R1313"27.17"+0.2%Compare
255/50R1717"27.04"−0.2%Compare

One size up or down

Compare 205/75R15 with another size

With 215/75R15 tires, when your speedometer says 60 mph you are really going

61.3 mph

215/75R15 is +0.59 inches (+2.2%) in overall diameter. That is within the 3% most shops and makers allow.

205/75R15215/75R15Difference%
Overall diameter27.11"27.70"+0.59"+2.2%
Section width8.07"8.46"+0.39"+4.9%
Sidewall height6.05"6.35"+0.30"+4.9%
Circumference85.16"87.01"+1.86"+2.2%
Revolutions per mile744.0728.2−15.9−2.1%

Questions

How tall is a 205/75R15 tire?
A 205/75R15 tire is 27.1 inches tall (689 mm), calculated from the size. It is 8.1 inches wide with 6.1 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 205/75R15 mean?
205/75R15 means a tire 205 mm wide, with sidewalls 75% as tall as the tire is wide (154 mm), radial construction (R), for a 15 inch wheel.
How many revolutions per mile does a 205/75R15 tire make?
About 744 revolutions per mile, based on a circumference of 85.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 205/75R15 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 255/60R15 instead of 205/75R15?
255/60R15 is −0.06 inches (−0.2%) 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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