225/30R20 tire size

A 225/30R20 tire is 25.31 in (643.0 mm) tall and 8.86 in (225.0 mm) wide, and turns 797 revolutions per mile.

225/30R20 dimensions
MeasurementInchesMillimeters
Overall diameter25.31 in643.0 mm
Section width8.86 in225.0 mm
Sidewall height2.66 in67.5 mm
Rim diameter20.00 in508.0 mm
Circumference79.53 in2,020 mm
Revolutions per mile797
Flotation equivalent25.3x8.9R20 (approx.)

225/30R20 is a 20-inch tire with a 225 mm (8.86 in) section width and a 30% aspect ratio, giving a 2.66-inch sidewall and a flotation-style size of about 25.3x8.9R20.

Its overall diameter is 25.31 inches, so it rolls 79.5 inches per revolution and turns about 797 times per mile.

54 other sizes in this list are within 3% of that diameter.

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Sizes within 3% of 25.31 in diameter

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Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.