265/65R18 tire size

A 265/65R18 tire is 31.56 in (801.7 mm) tall and 10.43 in (265.0 mm) wide, and turns 639 revolutions per mile.

265/65R18 dimensions
MeasurementInchesMillimeters
Overall diameter31.56 in801.7 mm
Section width10.43 in265.0 mm
Sidewall height6.78 in172.3 mm
Rim diameter18.00 in457.2 mm
Circumference99.16 in2,519 mm
Revolutions per mile639
Flotation equivalent31.6x10.4R18 (approx.)

265/65R18 is a 18-inch tire with a 265 mm (10.43 in) section width and a 65% aspect ratio, giving a 6.78-inch sidewall and a flotation-style size of about 31.6x10.4R18.

Its overall diameter is 31.56 inches, so it rolls 99.2 inches per revolution and turns about 639 times per mile.

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

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Sizes within 3% of 31.56 in diameter

Open 265/65R18 in the tire size calculator

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