285/75R18 tire size

A 285/75R18 tire is 34.83 in (884.7 mm) tall and 11.22 in (285.0 mm) wide, and turns 579 revolutions per mile.

• 34.83 inOverall diameter
• 8.42 inSidewall height
• 579Revolutions per mile
• 34.8x11.2R18Flotation equivalent

285/75R18 is a 18-inch tire with a 285 mm (11.22 in) section width and a 75% aspect ratio, giving a 8.42-inch sidewall and a flotation-style size of about 34.8x11.2R18.

Its overall diameter is 34.83 inches, so it rolls 109.4 inches per revolution and turns about 579 times per mile.

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

Compare 285/75R18 with plausible swaps

• 315/75R16 vs 285/75R18 (−0.66%)
• 315/70R17 vs 285/75R18 (−1.35%)
• 35x11.50R17 vs 285/75R18 (+0.49%)
• 35x12.50R17 vs 285/75R18 (+0.49%)
• 315/75R17 vs 285/75R18 (+2.22%)
• 285/70R18 vs 285/75R18 (−3.22%)
• 295/70R18 vs 285/75R18 (−1.64%)
• 305/70R18 vs 285/75R18 (−0.06%)
• 285/75R18 vs 35x12.50R18 (+0.49%)
• 285/75R18 vs 315/70R18 (+1.53%)
• 285/75R18 vs 295/60R20 (−2.57%)
• 285/75R18 vs 275/65R20 (−2.17%)
• 285/75R18 vs 315/60R20 (+0.15%)
• 285/75R18 vs 35x12.50R20 (+0.49%)
• 285/75R18 vs 35x13.50R20 (+0.49%)
• 285/75R18 vs 325/60R20 (+1.50%)

Sizes within 3% of 34.83 in diameter

• 305/70R18 34.81 in (−0.06%)
• 325/50R22 34.80 in (−0.10%)
• 315/60R20 34.88 in (+0.15%)
• 35x11.50R17 35.00 in (+0.49%)
• 35x12.50R24 35.00 in (+0.49%)
• 35x12.50R15 35.00 in (+0.49%)
• 35x12.50R17 35.00 in (+0.49%)
• 35x12.50R18 35.00 in (+0.49%)
• 35x12.50R20 35.00 in (+0.49%)
• 35x13.50R20 35.00 in (+0.49%)
• 35x12.50R22 35.00 in (+0.49%)
• 315/75R16 34.60 in (−0.66%)
• 315/70R17 34.36 in (−1.35%)
• 325/60R20 35.35 in (+1.50%)
• 315/70R18 35.36 in (+1.53%)
• 295/70R18 34.26 in (−1.64%)
• 275/65R20 34.07 in (−2.17%)
• 315/75R17 35.60 in (+2.22%)
• 295/60R20 33.94 in (−2.57%)
• 285/75R17 33.83 in (−2.87%)

Open 285/75R18 in the tire size calculator

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.