225/70R16 tire size in inches

A 225/70R16 tire measures

28.4" tall × 8.9" wide

6.20" sidewall on a 16" wheel. 710 revolutions per mile.

225/70R16 means a tire 225 mm wide, with sidewalls 70% as tall as the tire is wide (158 mm), radial construction (R), for a 16 inch wheel.

28.4"16" rim6.2"8.9" wide
225/70R16: 28.4 inches tall, 8.9 inches wide, on a 16 inch rim, drawn to scale

225/70R16 specs

Overall diameter (height)28.40 inches (721 mm)
Section width8.86 inches (225 mm)
Sidewall height6.20 inches (158 mm)
Wheel (rim) diameter16 inches
Circumference89.2 inches (2,266 mm)
Revolutions per mile710
Revolutions per kilometer441
Approximate rim width6.0" to 7.5"
In inches (flotation style)28.4x8.9R16
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 225/70R16 on a 16" wheel

These 16" sizes are within 3% of 225/70R16's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
185/85R1628.38"7.28"−0.1%60.0 mphCompare
285/55R1628.34"11.22"−0.2%59.9 mphCompare
195/80R1628.28"7.68"−0.4%59.8 mphCompare
265/60R1628.52"10.43"+0.4%60.2 mphCompare
245/65R1628.54"9.65"+0.5%60.3 mphCompare
205/75R1628.11"8.07"−1.0%59.4 mphCompare
215/75R1628.70"8.46"+1.0%60.6 mphCompare
255/60R1628.05"10.04"−1.2%59.3 mphCompare
235/65R1628.03"9.25"−1.3%59.2 mphCompare
295/55R1628.78"11.61"+1.3%60.8 mphCompare
275/55R1627.91"10.83"−1.7%59.0 mphCompare
205/80R1628.91"8.07"+1.8%61.1 mphCompare

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

SizeWheelDiameterDifference
235/40R2121"28.40"0.0%Compare
305/35R2020"28.41"0.0%Compare
325/25R2222"28.40"0.0%Compare
215/85R1414"28.39"0.0%Compare
265/45R1919"28.39"0.0%Compare
355/30R2020"28.39"−0.1%Compare
245/80R1313"28.43"+0.1%Compare
265/50R1818"28.43"+0.1%Compare
315/30R2121"28.44"+0.1%Compare
295/45R1818"28.45"+0.2%Compare
265/40R2020"28.35"−0.2%Compare
215/50R2020"28.46"+0.2%Compare

One size up or down

Compare 225/70R16 with another size

With 235/70R16 tires, when your speedometer says 60 mph you are really going

61.2 mph

235/70R16 is +0.55 inches (+1.9%) in overall diameter. That is within the 3% most shops and makers allow.

225/70R16235/70R16Difference%
Overall diameter28.40"28.95"+0.55"+1.9%
Section width8.86"9.25"+0.39"+4.4%
Sidewall height6.20"6.48"+0.28"+4.4%
Circumference89.23"90.96"+1.73"+1.9%
Revolutions per mile710.1696.6−13.5−1.9%

Questions

How tall is a 225/70R16 tire?
A 225/70R16 tire is 28.4 inches tall (721 mm), calculated from the size. It is 8.9 inches wide with 6.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 225/70R16 mean?
225/70R16 means a tire 225 mm wide, with sidewalls 70% as tall as the tire is wide (158 mm), radial construction (R), for a 16 inch wheel.
How many revolutions per mile does a 225/70R16 tire make?
About 710 revolutions per mile, based on a circumference of 89.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 225/70R16 tire?
Roughly 6.0" to 7.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 185/85R16 instead of 225/70R16?
185/85R16 is −0.02 inches (−0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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