225/30R20 Tire Size in Inches

25.3" tall, 8.9" wide, 2.7" sidewall

Diameter25.3"643 mm
Overall diameter25.3"643 mm
Section width8.9"225 mm
Sidewall height2.7"68 mm
Circumference79.5"2020 mm
Revolutions per mile797495 per km
Wheel diameter20"≈ 25.3x8.9R20 in inches

A 225/30R20 tire is 25.3 inches (643 mm) tall and 8.9 inches wide. The sidewall is 30% of the width, 2.7 inches, on a 20-inch wheel, and the tire turns about 797 times per mile.

In flotation terms that is about 25.3x8.9R20. People often call it a 25-inch tire.

225/30R20
225/30R20
Diameter difference±0.00%diameter 25.31" → 25.31"
CurrentNew
CurrentNewDifference

Speedometer

ShowsActual speed

Gear ratio to match

–enter your current axle ratio

Same height on a different wheel

Sizes within 2% of 25.3" on 18" wheels.

SizeDiameterWidthSidewallvs 225/30R20
265/35R1825.3"10.4"3.7"−0.0%
305/30R1825.2"12.0"3.6"−0.4%
315/30R1825.4"12.4"3.7"+0.5%
275/35R1825.6"10.8"3.8"+1.0%
255/35R1825.0"10.0"3.5"−1.1%
295/30R1825.0"11.6"3.5"−1.4%

225/30R20 FAQ

How tall is a 225/30R20 tire?

25.3 inches (643 mm). The sidewall is 2.7 inches.

How wide is a 225/30R20 tire?

8.9 inches (225 mm) section width, measured sidewall to sidewall.

What is 225/30R20 in flotation size?

About 25.3x8.9R20.