215/45R16 tire size in inches

A 215/45R16 tire measures

23.6" tall × 8.5" wide

3.81" sidewall on a 16" wheel. 854 revolutions per mile.

215/45R16 means a tire 215 mm wide, with sidewalls 45% as tall as the tire is wide (97 mm), radial construction (R), for a 16 inch wheel.

23.6"16" rim3.8"8.5" wide
215/45R16: 23.6 inches tall, 8.5 inches wide, on a 16 inch rim, drawn to scale

215/45R16 specs

Overall diameter (height)23.62 inches (600 mm)
Section width8.46 inches (215 mm)
Sidewall height3.81 inches (97 mm)
Wheel (rim) diameter16 inches
Circumference74.2 inches (1,885 mm)
Revolutions per mile854
Revolutions per kilometer531
Approximate rim width7.0" to 8.5"
In inches (flotation style)23.6x8.5R16
Aspect ratio45%

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 215/45R16 on a 16" wheel

These 16" sizes are within 3% of 215/45R16's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
175/55R1623.58"6.89"−0.2%59.9 mphCompare
195/50R1623.68"7.68"+0.3%60.2 mphCompare
245/40R1623.72"9.65"+0.4%60.3 mphCompare
235/40R1623.40"9.25"−0.9%59.4 mphCompare
185/50R1623.28"7.28"−1.4%59.1 mphCompare
225/45R1623.97"8.86"+1.5%60.9 mphCompare
205/45R1623.26"8.07"−1.5%59.1 mphCompare
185/55R1624.01"7.28"+1.7%61.0 mphCompare
255/40R1624.03"10.04"+1.8%61.1 mphCompare
205/50R1624.07"8.07"+1.9%61.2 mphCompare
225/40R1623.09"8.86"−2.3%58.6 mphCompare
175/60R1624.27"6.89"+2.8%61.7 mphCompare

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

SizeWheelDiameterDifference
235/25R1919"23.63"0.0%Compare
225/60R1313"23.63"+0.1%Compare
175/70R1414"23.65"+0.1%Compare
205/35R1818"23.65"+0.1%Compare
185/45R1717"23.56"−0.3%Compare
245/45R1515"23.68"+0.3%Compare
205/60R1414"23.69"+0.3%Compare
185/60R1515"23.74"+0.5%Compare
165/75R1414"23.74"+0.5%Compare
205/65R1313"23.49"−0.5%Compare
225/55R1414"23.74"+0.5%Compare
195/70R1313"23.75"+0.6%Compare

One size up or down

Compare 215/45R16 with another size

With 225/45R16 tires, when your speedometer says 60 mph you are really going

60.9 mph

225/45R16 is +0.35 inches (+1.5%) in overall diameter. That is within the 3% most shops and makers allow.

215/45R16225/45R16Difference%
Overall diameter23.62"23.97"+0.35"+1.5%
Section width8.46"8.86"+0.39"+4.7%
Sidewall height3.81"3.99"+0.18"+4.7%
Circumference74.20"75.31"+1.11"+1.5%
Revolutions per mile853.9841.3−12.6−1.5%

Questions

How tall is a 215/45R16 tire?
A 215/45R16 tire is 23.6 inches tall (600 mm), calculated from the size. It is 8.5 inches wide with 3.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 215/45R16 mean?
215/45R16 means a tire 215 mm wide, with sidewalls 45% as tall as the tire is wide (97 mm), radial construction (R), for a 16 inch wheel.
How many revolutions per mile does a 215/45R16 tire make?
About 854 revolutions per mile, based on a circumference of 74.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 215/45R16 tire?
Roughly 7.0" to 8.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 175/55R16 instead of 215/45R16?
175/55R16 is −0.04 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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