335/55R20 tire size in inches

A 335/55R20 tire measures

34.5" tall × 13.2" wide

7.25" sidewall on a 20" wheel. 584 revolutions per mile.

335/55R20 means a tire 335 mm wide, with sidewalls 55% as tall as the tire is wide (184 mm), radial construction (R), for a 20 inch wheel.

34.5"20" rim7.3"13.2" wide
335/55R20: 34.5 inches tall, 13.2 inches wide, on a 20 inch rim, drawn to scale

335/55R20 specs

Overall diameter (height)34.51 inches (876 mm)
Section width13.19 inches (335 mm)
Sidewall height7.25 inches (184 mm)
Wheel (rim) diameter20 inches
Circumference108.4 inches (2,754 mm)
Revolutions per mile584
Revolutions per kilometer363
Approximate rim width9.5" to 11.0"
In inches (flotation style)34.5x13.2R20
Aspect ratio55%

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 335/55R20 on a 20" wheel

These 20" sizes are within 3% of 335/55R20's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
285/65R2034.59"11.22"+0.2%60.1 mphCompare
305/60R2034.41"12.01"−0.3%59.8 mphCompare
315/60R2034.88"12.40"+1.1%60.7 mphCompare
275/65R2034.07"10.83"−1.3%59.2 mphCompare
325/55R2034.07"12.80"−1.3%59.2 mphCompare
345/55R2034.94"13.58"+1.3%60.8 mphCompare
35x12.50R2035.00"12.50"+1.4%60.9 mphCompare
355/50R2033.98"13.98"−1.5%59.1 mphCompare
295/60R2033.94"11.61"−1.7%59.0 mphCompare
295/65R2035.10"11.61"+1.7%61.0 mphCompare
325/60R2035.35"12.80"+2.5%61.5 mphCompare
315/55R2033.64"12.40"−2.5%58.5 mphCompare

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

SizeWheelDiameterDifference
335/40R2424"34.55"+0.1%Compare
355/45R2222"34.58"+0.2%Compare
295/80R1616"34.58"+0.2%Compare
345/50R2121"34.58"+0.2%Compare
295/75R1717"34.42"−0.3%Compare
275/85R1616"34.41"−0.3%Compare
305/65R1919"34.61"+0.3%Compare
315/50R2222"34.40"−0.3%Compare
325/65R1818"34.63"+0.4%Compare
355/55R1919"34.37"−0.4%Compare
315/55R2121"34.64"+0.4%Compare
315/70R1717"34.36"−0.4%Compare

One size up or down

Compare 335/55R20 with another size

With 345/55R20 tires, when your speedometer says 60 mph you are really going

60.8 mph

345/55R20 is +0.43 inches (+1.3%) in overall diameter. That is within the 3% most shops and makers allow.

335/55R20345/55R20Difference%
Overall diameter34.51"34.94"+0.43"+1.3%
Section width13.19"13.58"+0.39"+3.0%
Sidewall height7.25"7.47"+0.22"+3.0%
Circumference108.41"109.77"+1.36"+1.3%
Revolutions per mile584.4577.2−7.2−1.2%

Questions

How tall is a 335/55R20 tire?
A 335/55R20 tire is 34.5 inches tall (876 mm), calculated from the size. It is 13.2 inches wide with 7.3 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 335/55R20 mean?
335/55R20 means a tire 335 mm wide, with sidewalls 55% as tall as the tire is wide (184 mm), radial construction (R), for a 20 inch wheel.
How many revolutions per mile does a 335/55R20 tire make?
About 584 revolutions per mile, based on a circumference of 108.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 335/55R20 tire?
Roughly 9.5" to 11.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 285/65R20 instead of 335/55R20?
285/65R20 is +0.08 inches (+0.2%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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