255/35R18 tire size

A 255/35R18 tire is 25.03 in (635.7 mm) tall and 10.04 in (255.0 mm) wide, and turns 806 revolutions per mile.

255/35R18 dimensions
MeasurementInchesMillimeters
Overall diameter25.03 in635.7 mm
Section width10.04 in255.0 mm
Sidewall height3.51 in89.3 mm
Rim diameter18.00 in457.2 mm
Circumference78.63 in1,997 mm
Revolutions per mile806
Flotation equivalent25.0x10.0R18 (approx.)

255/35R18 is a 18-inch tire with a 255 mm (10.04 in) section width and a 35% aspect ratio, giving a 3.51-inch sidewall and a flotation-style size of about 25.0x10.0R18.

Its overall diameter is 25.03 inches, so it rolls 78.6 inches per revolution and turns about 806 times per mile.

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

Compare 255/35R18 with plausible swaps

Sizes within 3% of 25.03 in diameter

Open 255/35R18 in the tire size calculator

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