235/50R18 tire size

A 235/50R18 tire is 27.25 in (692.2 mm) tall and 9.25 in (235.0 mm) wide, and turns 740 revolutions per mile.

• 27.25 inOverall diameter
• 4.63 inSidewall height
• 740Revolutions per mile
• 27.3x9.3R18Flotation equivalent

235/50R18 is a 18-inch tire with a 235 mm (9.25 in) section width and a 50% aspect ratio, giving a 4.63-inch sidewall and a flotation-style size of about 27.3x9.3R18.

Its overall diameter is 27.25 inches, so it rolls 85.6 inches per revolution and turns about 740 times per mile.

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

Compare 235/50R18 with plausible swaps

• 215/65R16 vs 235/50R18 (−0.91%)
• 235/60R16 vs 235/50R18 (−0.55%)
• 225/65R16 vs 235/50R18 (+0.97%)
• 245/60R16 vs 235/50R18 (+1.18%)
• 255/50R17 vs 235/50R18 (−0.78%)
• 215/60R17 vs 235/50R18 (−0.35%)
• 235/55R17 vs 235/50R18 (−0.27%)
• 235/45R18 vs 235/50R18 (−3.39%)
• 215/50R18 vs 235/50R18 (−2.89%)
• 225/50R18 vs 235/50R18 (−1.44%)
• 255/45R18 vs 235/50R18 (−0.79%)
• 235/50R18 vs 295/40R18 (+0.14%)
• 235/50R18 vs 215/55R18 (+0.22%)
• 235/50R18 vs 265/45R18 (+0.51%)
• 235/50R18 vs 245/50R18 (+1.44%)
• 235/50R18 vs 255/50R18 (+2.89%)
• 235/50R18 vs 235/55R18 (+3.39%)
• 235/50R18 vs 255/40R19 (−0.81%)
• 235/50R18 vs 295/35R19 (−0.45%)
• 235/50R18 vs 235/45R19 (+0.27%)
• 235/50R18 vs 265/40R19 (+0.35%)
• 235/50R18 vs 305/35R19 (+0.56%)
• 235/50R18 vs 295/30R20 (−1.04%)
• 235/50R18 vs 255/35R20 (−0.82%)
• 235/50R18 vs 225/40R20 (−0.61%)
• 235/50R18 vs 265/35R20 (+0.19%)

Sizes within 3% of 27.25 in diameter

• 225/75R14 27.29 in (+0.13%)
• 295/40R18 27.29 in (+0.14%)
• 265/35R20 27.30 in (+0.19%)
• 215/55R18 27.31 in (+0.22%)
• 235/45R19 27.33 in (+0.27%)
• 235/55R17 27.18 in (−0.27%)
• 265/40R19 27.35 in (+0.35%)
• 215/60R17 27.16 in (−0.35%)
• 295/35R19 27.13 in (−0.45%)
• 265/45R18 27.39 in (+0.51%)
• 205/75R15 27.11 in (−0.53%)
• 225/70R15 27.40 in (+0.55%)
• 235/60R16 27.10 in (−0.55%)
• 305/35R19 27.41 in (+0.56%)
• 225/40R20 27.09 in (−0.61%)
• 255/50R17 27.04 in (−0.78%)
• 255/45R18 27.04 in (−0.79%)
• 255/40R19 27.03 in (−0.81%)
• 255/35R20 27.03 in (−0.82%)
• 275/30R21 27.50 in (+0.90%)
• 215/65R16 27.00 in (−0.91%)
• 27x8.50R14 27.00 in (−0.92%)
• 225/65R16 27.52 in (+0.97%)
• 285/40R18 26.98 in (−1.01%)
• 225/45R19 26.97 in (−1.03%)
• 295/30R20 26.97 in (−1.04%)
• 245/60R16 27.57 in (+1.18%)
• 275/35R20 27.58 in (+1.20%)
• 245/55R17 27.61 in (+1.31%)
• 225/60R17 27.63 in (+1.39%)
• 225/50R18 26.86 in (−1.44%)
• 245/50R18 27.65 in (+1.44%)
• 285/35R19 26.85 in (−1.46%)
• 215/70R15 26.85 in (−1.47%)
• 275/40R19 27.66 in (+1.50%)
• 245/45R19 27.68 in (+1.57%)
• 215/75R15 27.70 in (+1.63%)
• 245/40R20 27.72 in (+1.70%)
• 225/55R18 27.74 in (+1.81%)
• 275/45R18 27.74 in (+1.81%)
• 245/35R21 27.75 in (+1.83%)
• 245/35R20 26.75 in (−1.83%)
• 225/55R17 26.74 in (−1.86%)
• 285/30R20 26.73 in (−1.91%)
• 245/30R22 27.79 in (+1.96%)
• 245/40R19 26.72 in (−1.96%)
• 295/25R22 27.81 in (+2.04%)
• 215/75R14 26.70 in (−2.04%)
• 245/45R18 26.68 in (−2.09%)
• 275/40R18 26.66 in (−2.17%)
• 215/70R16 27.85 in (+2.20%)
• 285/35R20 27.85 in (+2.21%)
• 225/50R19 27.86 in (+2.22%)
• 245/50R17 26.65 in (−2.22%)
• 225/60R16 26.63 in (−2.28%)
• 275/35R19 26.58 in (−2.47%)
• 235/70R15 27.95 in (+2.57%)
• 295/30R21 27.97 in (+2.63%)
• 285/40R19 27.98 in (+2.66%)
• 225/65R15 26.52 in (−2.70%)
• 215/65R17 28.00 in (+2.76%)
• 275/30R20 26.50 in (−2.77%)
• 205/65R16 26.49 in (−2.79%)
• 255/30R22 28.02 in (+2.83%)
• 235/65R16 28.03 in (+2.85%)
• 255/35R21 28.03 in (+2.85%)
• 235/35R20 26.48 in (−2.85%)
• 255/40R20 28.03 in (+2.86%)
• 255/45R19 28.04 in (+2.87%)
• 215/50R18 26.46 in (−2.89%)
• 255/50R18 28.04 in (+2.89%)

Open 235/50R18 in the tire size calculator

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