235/80R16 tire size in inches

A 235/80R16 tire measures

30.8" tall × 9.3" wide

7.40" sidewall on a 16" wheel. 655 revolutions per mile.

235/80R16 means a tire 235 mm wide, with sidewalls 80% as tall as the tire is wide (188 mm), radial construction (R), for a 16 inch wheel.

30.8"16" rim7.4"9.3" wide
235/80R16: 30.8 inches tall, 9.3 inches wide, on a 16 inch rim, drawn to scale

235/80R16 specs

Overall diameter (height)30.80 inches (782 mm)
Section width9.25 inches (235 mm)
Sidewall height7.40 inches (188 mm)
Wheel (rim) diameter16 inches
Circumference96.8 inches (2,458 mm)
Revolutions per mile655
Revolutions per kilometer407
Approximate rim width6.0" to 7.5"
In inches (flotation style)30.8x9.3R16
Aspect ratio80%

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 235/80R16 on a 16" wheel

These 16" sizes are within 3% of 235/80R16's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
265/70R1630.61"10.43"−0.6%59.6 mphCompare
285/65R1630.59"11.22"−0.7%59.6 mphCompare
225/85R1631.06"8.86"+0.8%60.5 mphCompare
255/75R1631.06"10.04"+0.8%60.5 mphCompare
295/65R1631.10"11.61"+1.0%60.6 mphCompare
245/75R1630.47"9.65"−1.1%59.3 mphCompare
275/70R1631.16"10.83"+1.2%60.7 mphCompare
215/85R1630.39"8.46"−1.3%59.2 mphCompare
225/80R1630.17"8.86"−2.0%58.8 mphCompare
245/80R1631.43"9.65"+2.0%61.2 mphCompare
275/65R1630.07"10.83"−2.4%58.6 mphCompare
255/70R1630.06"10.04"−2.4%58.5 mphCompare

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

SizeWheelDiameterDifference
305/45R2020"30.81"0.0%Compare
325/50R1818"30.80"0.0%Compare
345/25R2424"30.79"0.0%Compare
355/35R2121"30.78"−0.1%Compare
275/50R2020"30.83"+0.1%Compare
295/55R1818"30.78"−0.1%Compare
225/55R2121"30.74"−0.2%Compare
275/45R2121"30.74"−0.2%Compare
345/40R2020"30.87"+0.2%Compare
335/45R1919"30.87"+0.2%Compare
285/30R2424"30.73"−0.2%Compare
235/75R1717"30.88"+0.2%Compare

One size up or down

Compare 235/80R16 with another size

With 245/80R16 tires, when your speedometer says 60 mph you are really going

61.2 mph

245/80R16 is +0.63 inches (+2.0%) in overall diameter. That is within the 3% most shops and makers allow.

235/80R16245/80R16Difference%
Overall diameter30.80"31.43"+0.63"+2.0%
Section width9.25"9.65"+0.39"+4.3%
Sidewall height7.40"7.72"+0.31"+4.3%
Circumference96.77"98.75"+1.98"+2.0%
Revolutions per mile654.7641.6−13.1−2.0%

Questions

How tall is a 235/80R16 tire?
A 235/80R16 tire is 30.8 inches tall (782 mm), calculated from the size. It is 9.3 inches wide with 7.4 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 235/80R16 mean?
235/80R16 means a tire 235 mm wide, with sidewalls 80% as tall as the tire is wide (188 mm), radial construction (R), for a 16 inch wheel.
How many revolutions per mile does a 235/80R16 tire make?
About 655 revolutions per mile, based on a circumference of 96.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 235/80R16 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 265/70R16 instead of 235/80R16?
265/70R16 is −0.20 inches (−0.6%) in overall diameter, so at an indicated 60 mph you would be doing 59.6 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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