225/40R20 tire size

A 225/40R20 tire is 27.09 in (688.0 mm) tall and 8.86 in (225.0 mm) wide, and turns 745 revolutions per mile.

• 27.09 inOverall diameter
• 3.54 inSidewall height
• 745Revolutions per mile
• 27.1x8.9R20Flotation equivalent

225/40R20 is a 20-inch tire with a 225 mm (8.86 in) section width and a 40% aspect ratio, giving a 3.54-inch sidewall and a flotation-style size of about 27.1x8.9R20.

Its overall diameter is 27.09 inches, so it rolls 85.1 inches per revolution and turns about 745 times per mile.

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

Compare 225/40R20 with plausible swaps

• 225/50R18 vs 225/40R20 (−0.84%)
• 285/40R18 vs 225/40R20 (−0.41%)
• 255/45R18 vs 225/40R20 (−0.19%)
• 235/50R18 vs 225/40R20 (+0.61%)
• 295/40R18 vs 225/40R20 (+0.76%)
• 215/55R18 vs 225/40R20 (+0.83%)
• 285/35R19 vs 225/40R20 (−0.86%)
• 225/45R19 vs 225/40R20 (−0.42%)
• 255/40R19 vs 225/40R20 (−0.20%)
• 295/35R19 vs 225/40R20 (+0.16%)
• 235/45R19 vs 225/40R20 (+0.89%)
• 265/40R19 vs 225/40R20 (+0.96%)
• 225/35R20 vs 225/40R20 (−3.27%)
• 295/30R20 vs 225/40R20 (−0.44%)
• 255/35R20 vs 225/40R20 (−0.22%)
• 225/40R20 vs 265/35R20 (+0.80%)
• 225/40R20 vs 245/40R20 (+2.33%)

Sizes within 3% of 27.09 in diameter

• 235/60R16 27.10 in (+0.06%)
• 205/75R15 27.11 in (+0.07%)
• 295/35R19 27.13 in (+0.16%)
• 255/50R17 27.04 in (−0.17%)
• 255/45R18 27.04 in (−0.19%)
• 255/40R19 27.03 in (−0.20%)
• 255/35R20 27.03 in (−0.22%)
• 215/60R17 27.16 in (+0.26%)
• 215/65R16 27.00 in (−0.31%)
• 27x8.50R14 27.00 in (−0.32%)
• 235/55R17 27.18 in (+0.33%)
• 285/40R18 26.98 in (−0.41%)
• 225/45R19 26.97 in (−0.42%)
• 295/30R20 26.97 in (−0.44%)
• 235/50R18 27.25 in (+0.61%)
• 225/75R14 27.29 in (+0.74%)
• 295/40R18 27.29 in (+0.76%)
• 265/35R20 27.30 in (+0.80%)
• 215/55R18 27.31 in (+0.83%)
• 225/50R18 26.86 in (−0.84%)
• 285/35R19 26.85 in (−0.86%)
• 215/70R15 26.85 in (−0.87%)
• 235/45R19 27.33 in (+0.89%)
• 265/40R19 27.35 in (+0.96%)
• 265/45R18 27.39 in (+1.12%)
• 225/70R15 27.40 in (+1.16%)
• 305/35R19 27.41 in (+1.18%)
• 245/35R20 26.75 in (−1.24%)
• 225/55R17 26.74 in (−1.26%)
• 285/30R20 26.73 in (−1.31%)
• 245/40R19 26.72 in (−1.37%)
• 215/75R14 26.70 in (−1.44%)
• 245/45R18 26.68 in (−1.50%)
• 275/30R21 27.50 in (+1.51%)
• 275/40R18 26.66 in (−1.57%)
• 225/65R16 27.52 in (+1.58%)
• 245/50R17 26.65 in (−1.63%)
• 225/60R16 26.63 in (−1.69%)
• 245/60R16 27.57 in (+1.80%)
• 275/35R20 27.58 in (+1.82%)
• 275/35R19 26.58 in (−1.88%)
• 245/55R17 27.61 in (+1.93%)
• 225/60R17 27.63 in (+2.01%)
• 245/50R18 27.65 in (+2.06%)
• 225/65R15 26.52 in (−2.11%)
• 275/40R19 27.66 in (+2.12%)
• 275/30R20 26.50 in (−2.18%)
• 245/45R19 27.68 in (+2.19%)
• 205/65R16 26.49 in (−2.19%)
• 215/75R15 27.70 in (+2.25%)
• 235/35R20 26.48 in (−2.25%)
• 215/50R18 26.46 in (−2.30%)
• 245/40R20 27.72 in (+2.33%)
• 225/55R18 27.74 in (+2.43%)
• 275/45R18 27.74 in (+2.43%)
• 245/35R21 27.75 in (+2.46%)
• 225/70R14 26.40 in (−2.53%)
• 235/40R19 26.40 in (−2.53%)
• 245/30R22 27.79 in (+2.59%)
• 295/25R22 27.81 in (+2.66%)
• 265/40R18 26.35 in (−2.73%)
• 235/45R18 26.33 in (−2.81%)
• 215/70R16 27.85 in (+2.82%)
• 285/35R20 27.85 in (+2.83%)
• 225/50R19 27.86 in (+2.85%)
• 215/55R17 26.31 in (−2.86%)
• 265/35R19 26.30 in (−2.89%)
• 205/70R15 26.30 in (−2.91%)

Open 225/40R20 in the tire size calculator

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