265/55R20 Tire Size in Inches

31.5" tall, 10.4" wide, 5.7" sidewall

Diameter31.5"800 mm
Overall diameter31.5"800 mm
Section width10.4"265 mm
Sidewall height5.7"146 mm
Circumference98.9"2512 mm
Revolutions per mile641398 per km
Wheel diameter20"≈ 31.5x10.4R20 in inches

A 265/55R20 tire is 31.5 inches (800 mm) tall and 10.4 inches wide. The sidewall is 55% of the width, 5.7 inches, on a 20-inch wheel, and the tire turns about 641 times per mile.

In flotation terms that is about 31.5x10.4R20. People often call it a 31-inch tire.

The size most often compared with it is 245/60R20, which is 0.1" taller (+0.3%). At an indicated 60 mph you would be doing 60.2 mph on it.

265/55R20
245/60R20
Diameter difference+0.31%diameter 31.48" → 31.57"
CurrentNew
CurrentNewDifference

Speedometer

ShowsActual speed

Gear ratio to match

–enter your current axle ratio

Sizes near 265/55R20

Same 20" wheel, within 20 mm of width and 10 points of aspect ratio.

SizeDiameterWidthSidewallvs 265/55R20
245/60R2031.6"9.6"5.8"+0.3%
285/50R2031.2"11.2"5.6"−0.8%
275/55R2031.9"10.8"6.0"+1.4%
255/60R2032.0"10.0"6.0"+1.8%
275/50R2030.8"10.8"5.4"−2.1%
245/55R2030.6"9.6"5.3"−2.8%
285/55R2032.3"11.2"6.2"+2.8%
265/60R2032.5"10.4"6.3"+3.3%
275/60R2033.0"10.8"6.5"+4.8%
255/65R2033.1"10.0"6.5"+5.0%

Same height on a different wheel

Sizes within 2% of 31.5" on 18" or 19" or 22" wheels.

SizeDiameterWidthSidewallvs 265/55R20
285/60R1831.5"11.2"6.7"−0.0%
245/70R1831.5"9.6"6.8"+0.1%
225/70R1931.4"8.9"6.2"−0.2%
265/65R1831.6"10.4"6.8"+0.3%
265/45R2231.4"10.4"4.7"−0.3%
305/40R2231.6"12.0"4.8"+0.4%

Speedometer with a different size

Actual speed when the speedometer is calibrated for 265/55R20.

Speedometer showson 245/60R20on 285/50R20on 275/55R20
30 mph30.1 mph29.8 mph30.4 mph
45 mph45.1 mph44.6 mph45.6 mph
60 mph60.2 mph59.5 mph60.8 mph
70 mph70.2 mph69.4 mph71.0 mph

265/55R20 FAQ

How tall is a 265/55R20 tire?

31.5 inches (800 mm). The sidewall is 5.7 inches.

How wide is a 265/55R20 tire?

10.4 inches (265 mm) section width, measured sidewall to sidewall.

What is 265/55R20 in flotation size?

About 31.5x10.4R20.

Can I use 245/60R20 instead of 265/55R20?

245/60R20 is +0.3% in diameter, within the common 3% guideline. It is 0.8" narrower.