205/70R15 tire size in inches

A 205/70R15 tire measures

26.3" tall × 8.1" wide

5.65" sidewall on a 15" wheel. 767 revolutions per mile.

205/70R15 means a tire 205 mm wide, with sidewalls 70% as tall as the tire is wide (144 mm), radial construction (R), for a 15 inch wheel.

26.3"15" rim5.6"8.1" wide
205/70R15: 26.3 inches tall, 8.1 inches wide, on a 15 inch rim, drawn to scale

205/70R15 specs

Overall diameter (height)26.30 inches (668 mm)
Section width8.07 inches (205 mm)
Sidewall height5.65 inches (144 mm)
Wheel (rim) diameter15 inches
Circumference82.6 inches (2,099 mm)
Revolutions per mile767
Revolutions per kilometer477
Approximate rim width5.5" to 7.0"
In inches (flotation style)26.3x8.1R15
Aspect ratio70%

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 205/70R15 on a 15" wheel

These 15" sizes are within 3% of 205/70R15's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
285/50R1526.22"11.22"−0.3%59.8 mphCompare
265/55R1526.48"10.43"+0.7%60.4 mphCompare
235/60R1526.10"9.25"−0.7%59.6 mphCompare
195/75R1526.52"7.68"+0.8%60.5 mphCompare
225/65R1526.52"8.86"+0.8%60.5 mphCompare
165/85R1526.04"6.50"−1.0%59.4 mphCompare
255/55R1526.04"10.04"−1.0%59.4 mphCompare
245/60R1526.57"9.65"+1.0%60.6 mphCompare
175/80R1526.02"6.89"−1.0%59.4 mphCompare
215/65R1526.00"8.46"−1.1%59.3 mphCompare
185/80R1526.65"7.28"+1.3%60.8 mphCompare
185/75R1525.93"7.28"−1.4%59.1 mphCompare

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

SizeWheelDiameterDifference
265/35R1919"26.30"0.0%Compare
295/40R1717"26.29"0.0%Compare
215/55R1717"26.31"0.0%Compare
225/75R1313"26.29"0.0%Compare
225/30R2121"26.31"+0.1%Compare
195/80R1414"26.28"−0.1%Compare
235/45R1818"26.33"+0.1%Compare
175/75R1616"26.33"+0.1%Compare
205/45R1919"26.26"−0.1%Compare
265/30R2020"26.26"−0.1%Compare
265/40R1818"26.35"+0.2%Compare
235/50R1717"26.25"−0.2%Compare

One size up or down

Compare 205/70R15 with another size

With 215/70R15 tires, when your speedometer says 60 mph you are really going

61.3 mph

215/70R15 is +0.55 inches (+2.1%) in overall diameter. That is within the 3% most shops and makers allow.

205/70R15215/70R15Difference%
Overall diameter26.30"26.85"+0.55"+2.1%
Section width8.07"8.46"+0.39"+4.9%
Sidewall height5.65"5.93"+0.28"+4.9%
Circumference82.62"84.35"+1.73"+2.1%
Revolutions per mile766.9751.1−15.7−2.1%

Questions

How tall is a 205/70R15 tire?
A 205/70R15 tire is 26.3 inches tall (668 mm), calculated from the size. It is 8.1 inches wide with 5.6 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 205/70R15 mean?
205/70R15 means a tire 205 mm wide, with sidewalls 70% as tall as the tire is wide (144 mm), radial construction (R), for a 15 inch wheel.
How many revolutions per mile does a 205/70R15 tire make?
About 767 revolutions per mile, based on a circumference of 82.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 205/70R15 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 285/50R15 instead of 205/70R15?
285/50R15 is −0.08 inches (−0.3%) in overall diameter, so at an indicated 60 mph you would be doing 59.8 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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