275/60R20 tire size in inches

A 275/60R20 tire measures

33.0" tall × 10.8" wide

6.50" sidewall on a 20" wheel. 611 revolutions per mile.

275/60R20 means a tire 275 mm wide, with sidewalls 60% as tall as the tire is wide (165 mm), radial construction (R), for a 20 inch wheel.

33.0"20" rim6.5"10.8" wide
275/60R20: 33.0 inches tall, 10.8 inches wide, on a 20 inch rim, drawn to scale

275/60R20 specs

Overall diameter (height)32.99 inches (838 mm)
Section width10.83 inches (275 mm)
Sidewall height6.50 inches (165 mm)
Wheel (rim) diameter20 inches
Circumference103.6 inches (2,633 mm)
Revolutions per mile611
Revolutions per kilometer380
Approximate rim width7.5" to 9.0"
In inches (flotation style)33.0x10.8R20
Aspect ratio60%

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 275/60R20 on a 20" wheel

These 20" sizes are within 3% of 275/60R20's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
33x12.50R2033.00"12.50"0.0%60.0 mphCompare
255/65R2033.05"10.04"+0.2%60.1 mphCompare
325/50R2032.80"12.80"−0.6%59.6 mphCompare
335/50R2033.19"13.19"+0.6%60.4 mphCompare
295/55R2032.78"11.61"−0.7%59.6 mphCompare
305/55R2033.21"12.01"+0.7%60.4 mphCompare
355/45R2032.58"13.98"−1.3%59.2 mphCompare
245/65R2032.54"9.65"−1.4%59.2 mphCompare
265/60R2032.52"10.43"−1.4%59.1 mphCompare
285/60R2033.46"11.22"+1.4%60.9 mphCompare
265/65R2033.56"10.43"+1.7%61.0 mphCompare
315/50R2032.40"12.40"−1.8%58.9 mphCompare

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

SizeWheelDiameterDifference
33x12.50R1515"33.00"0.0%Compare
33x12.50R1616"33.00"0.0%Compare
33x12.50R1717"33.00"0.0%Compare
33x12.50R1818"33.00"0.0%Compare
33x12.50R2222"33.00"0.0%Compare
305/50R2121"33.01"0.0%Compare
285/40R2424"32.98"0.0%Compare
355/50R1919"32.98"0.0%Compare
325/35R2424"32.96"−0.1%Compare
285/80R1515"32.95"−0.1%Compare
255/55R2222"33.04"+0.2%Compare
295/60R1919"32.94"−0.2%Compare

One size up or down

Compare 275/60R20 with another size

With 285/60R20 tires, when your speedometer says 60 mph you are really going

60.9 mph

285/60R20 is +0.47 inches (+1.4%) in overall diameter. That is within the 3% most shops and makers allow.

275/60R20285/60R20Difference%
Overall diameter32.99"33.46"+0.47"+1.4%
Section width10.83"11.22"+0.39"+3.6%
Sidewall height6.50"6.73"+0.24"+3.6%
Circumference103.65"105.13"+1.48"+1.4%
Revolutions per mile611.3602.7−8.6−1.4%

Questions

How tall is a 275/60R20 tire?
A 275/60R20 tire is 33.0 inches tall (838 mm), calculated from the size. It is 10.8 inches wide with 6.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 275/60R20 mean?
275/60R20 means a tire 275 mm wide, with sidewalls 60% as tall as the tire is wide (165 mm), radial construction (R), for a 20 inch wheel.
How many revolutions per mile does a 275/60R20 tire make?
About 611 revolutions per mile, based on a circumference of 103.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 275/60R20 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 33x12.50R20 instead of 275/60R20?
33x12.50R20 is +0.01 inches (0.0%) 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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