235/35R20 tire size in inches

A 235/35R20 tire measures

26.5" tall × 9.3" wide

3.24" sidewall on a 20" wheel. 762 revolutions per mile.

235/35R20 means a tire 235 mm wide, with sidewalls 35% as tall as the tire is wide (82 mm), radial construction (R), for a 20 inch wheel.

26.5"20" rim3.2"9.3" wide
235/35R20: 26.5 inches tall, 9.3 inches wide, on a 20 inch rim, drawn to scale

235/35R20 specs

Overall diameter (height)26.48 inches (672 mm)
Section width9.25 inches (235 mm)
Sidewall height3.24 inches (82 mm)
Wheel (rim) diameter20 inches
Circumference83.2 inches (2,113 mm)
Revolutions per mile762
Revolutions per kilometer473
Approximate rim width7.5" to 9.0"
In inches (flotation style)26.5x9.3R20
Aspect ratio35%

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 235/35R20 on a 20" wheel

These 20" sizes are within 3% of 235/35R20's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
275/30R2026.50"10.83"+0.1%60.0 mphCompare
325/25R2026.40"12.80"−0.3%59.8 mphCompare
335/25R2026.59"13.19"+0.4%60.3 mphCompare
265/30R2026.26"10.43"−0.8%59.5 mphCompare
285/30R2026.73"11.22"+1.0%60.6 mphCompare
225/35R2026.20"8.86"−1.0%59.4 mphCompare
315/25R2026.20"12.40"−1.0%59.4 mphCompare
245/35R2026.75"9.65"+1.0%60.6 mphCompare
215/40R2026.77"8.46"+1.1%60.7 mphCompare
345/25R2026.79"13.58"+1.2%60.7 mphCompare
255/30R2026.02"10.04"−1.7%59.0 mphCompare
305/25R2026.00"12.01"−1.8%58.9 mphCompare

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

SizeWheelDiameterDifference
265/55R1515"26.48"0.0%Compare
185/65R1717"26.47"0.0%Compare
215/50R1818"26.46"0.0%Compare
205/65R1616"26.49"+0.1%Compare
295/45R1616"26.45"−0.1%Compare
245/70R1313"26.50"+0.1%Compare
195/55R1818"26.44"−0.1%Compare
315/30R1919"26.44"−0.1%Compare
195/75R1515"26.52"+0.1%Compare
225/65R1515"26.52"+0.1%Compare
265/50R1616"26.43"−0.2%Compare
265/60R1414"26.52"+0.2%Compare

One size up or down

Compare 235/35R20 with another size

With 245/35R20 tires, when your speedometer says 60 mph you are really going

60.6 mph

245/35R20 is +0.28 inches (+1.0%) in overall diameter. That is within the 3% most shops and makers allow.

235/35R20245/35R20Difference%
Overall diameter26.48"26.75"+0.28"+1.0%
Section width9.25"9.65"+0.39"+4.3%
Sidewall height3.24"3.38"+0.14"+4.3%
Circumference83.18"84.04"+0.87"+1.0%
Revolutions per mile761.7753.9−7.8−1.0%

Questions

How tall is a 235/35R20 tire?
A 235/35R20 tire is 26.5 inches tall (672 mm), calculated from the size. It is 9.3 inches wide with 3.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 235/35R20 mean?
235/35R20 means a tire 235 mm wide, with sidewalls 35% as tall as the tire is wide (82 mm), radial construction (R), for a 20 inch wheel.
How many revolutions per mile does a 235/35R20 tire make?
About 762 revolutions per mile, based on a circumference of 83.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 235/35R20 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 275/30R20 instead of 235/35R20?
275/30R20 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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