225/70R17 tire size in inches

A 225/70R17 tire measures

29.4" tall × 8.9" wide

6.20" sidewall on a 17" wheel. 686 revolutions per mile.

225/70R17 means a tire 225 mm wide, with sidewalls 70% as tall as the tire is wide (158 mm), radial construction (R), for a 17 inch wheel.

29.4"17" rim6.2"8.9" wide
225/70R17: 29.4 inches tall, 8.9 inches wide, on a 17 inch rim, drawn to scale

225/70R17 specs

Overall diameter (height)29.40 inches (747 mm)
Section width8.86 inches (225 mm)
Sidewall height6.20 inches (158 mm)
Wheel (rim) diameter17 inches
Circumference92.4 inches (2,346 mm)
Revolutions per mile686
Revolutions per kilometer426
Approximate rim width6.0" to 7.5"
In inches (flotation style)29.4x8.9R17
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 225/70R17 on a 17" wheel

These 17" sizes are within 3% of 225/70R17's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
315/50R1729.40"12.40"0.0%60.0 mphCompare
285/55R1729.34"11.22"−0.2%59.9 mphCompare
265/60R1729.52"10.43"+0.4%60.2 mphCompare
245/65R1729.54"9.65"+0.5%60.3 mphCompare
205/75R1729.11"8.07"−1.0%59.4 mphCompare
215/75R1729.70"8.46"+1.0%60.6 mphCompare
255/60R1729.05"10.04"−1.2%59.3 mphCompare
235/65R1729.03"9.25"−1.3%59.2 mphCompare
295/55R1729.78"11.61"+1.3%60.8 mphCompare
305/50R1729.01"12.01"−1.3%59.2 mphCompare
275/55R1728.91"10.83"−1.7%59.0 mphCompare
235/70R1729.95"9.25"+1.9%61.1 mphCompare

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

SizeWheelDiameterDifference
235/40R2222"29.40"0.0%Compare
245/85R1313"29.40"0.0%Compare
305/35R2121"29.41"0.0%Compare
275/25R2424"29.41"0.0%Compare
215/85R1515"29.39"0.0%Compare
265/45R2020"29.39"0.0%Compare
355/30R2121"29.39"−0.1%Compare
245/80R1414"29.43"+0.1%Compare
265/50R1919"29.43"+0.1%Compare
315/30R2222"29.44"+0.1%Compare
295/45R1919"29.45"+0.2%Compare
265/40R2121"29.35"−0.2%Compare

One size up or down

Compare 225/70R17 with another size

With 235/70R17 tires, when your speedometer says 60 mph you are really going

61.1 mph

235/70R17 is +0.55 inches (+1.9%) in overall diameter. That is within the 3% most shops and makers allow.

225/70R17235/70R17Difference%
Overall diameter29.40"29.95"+0.55"+1.9%
Section width8.86"9.25"+0.39"+4.4%
Sidewall height6.20"6.48"+0.28"+4.4%
Circumference92.37"94.10"+1.73"+1.9%
Revolutions per mile686.0673.3−12.6−1.8%

Questions

How tall is a 225/70R17 tire?
A 225/70R17 tire is 29.4 inches tall (747 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 225/70R17 mean?
225/70R17 means a tire 225 mm wide, with sidewalls 70% as tall as the tire is wide (158 mm), radial construction (R), for a 17 inch wheel.
How many revolutions per mile does a 225/70R17 tire make?
About 686 revolutions per mile, based on a circumference of 92.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 225/70R17 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 315/50R17 instead of 225/70R17?
315/50R17 is 0.00 inches (0.0%) 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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