235/45R16 tire size in inches

A 235/45R16 tire measures

24.3" tall × 9.3" wide

4.16" sidewall on a 16" wheel. 829 revolutions per mile.

235/45R16 means a tire 235 mm wide, with sidewalls 45% as tall as the tire is wide (106 mm), radial construction (R), for a 16 inch wheel.

24.3"16" rim4.2"9.3" wide
235/45R16: 24.3 inches tall, 9.3 inches wide, on a 16 inch rim, drawn to scale

235/45R16 specs

Overall diameter (height)24.33 inches (618 mm)
Section width9.25 inches (235 mm)
Sidewall height4.16 inches (106 mm)
Wheel (rim) diameter16 inches
Circumference76.4 inches (1,941 mm)
Revolutions per mile829
Revolutions per kilometer515
Approximate rim width7.5" to 9.0"
In inches (flotation style)24.3x9.3R16
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 235/45R16 on a 16" wheel

These 16" sizes are within 3% of 235/45R16's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
265/40R1624.35"10.43"+0.1%60.0 mphCompare
175/60R1624.27"6.89"−0.2%59.9 mphCompare
195/55R1624.44"7.68"+0.5%60.3 mphCompare
215/50R1624.46"8.46"+0.6%60.3 mphCompare
205/50R1624.07"8.07"−1.1%59.4 mphCompare
255/40R1624.03"10.04"−1.2%59.3 mphCompare
185/55R1624.01"7.28"−1.3%59.2 mphCompare
275/40R1624.66"10.83"+1.4%60.8 mphCompare
225/45R1623.97"8.86"−1.5%59.1 mphCompare
245/45R1624.68"9.65"+1.5%60.9 mphCompare
185/60R1624.74"7.28"+1.7%61.0 mphCompare
225/50R1624.86"8.86"+2.2%61.3 mphCompare

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

SizeWheelDiameterDifference
175/75R1414"24.33"0.0%Compare
225/30R1919"24.31"0.0%Compare
215/55R1515"24.31"−0.1%Compare
265/35R1717"24.30"−0.1%Compare
205/70R1313"24.30"−0.1%Compare
185/50R1717"24.28"−0.2%Compare
155/85R1414"24.37"+0.2%Compare
205/45R1717"24.26"−0.3%Compare
265/45R1515"24.39"+0.3%Compare
165/80R1414"24.39"+0.3%Compare
235/50R1515"24.25"−0.3%Compare
235/40R1717"24.40"+0.3%Compare

One size up or down

Compare 235/45R16 with another size

With 245/45R16 tires, when your speedometer says 60 mph you are really going

60.9 mph

245/45R16 is +0.35 inches (+1.5%) in overall diameter. That is within the 3% most shops and makers allow.

235/45R16245/45R16Difference%
Overall diameter24.33"24.68"+0.35"+1.5%
Section width9.25"9.65"+0.39"+4.3%
Sidewall height4.16"4.34"+0.18"+4.3%
Circumference76.42"77.54"+1.11"+1.5%
Revolutions per mile829.1817.1−11.9−1.4%

Questions

How tall is a 235/45R16 tire?
A 235/45R16 tire is 24.3 inches tall (618 mm), calculated from the size. It is 9.3 inches wide with 4.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 235/45R16 mean?
235/45R16 means a tire 235 mm wide, with sidewalls 45% as tall as the tire is wide (106 mm), radial construction (R), for a 16 inch wheel.
How many revolutions per mile does a 235/45R16 tire make?
About 829 revolutions per mile, based on a circumference of 76.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 235/45R16 tire?
Roughly 7.5" to 9.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 265/40R16 instead of 235/45R16?
265/40R16 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.

Browse