275/45R20 tire size

A 275/45R20 tire is 29.74 in (755.5 mm) tall and 10.83 in (275.0 mm) wide, and turns 678 revolutions per mile.

• 29.74 inOverall diameter
• 4.87 inSidewall height
• 678Revolutions per mile
• 29.7x10.8R20Flotation equivalent

275/45R20 is a 20-inch tire with a 275 mm (10.83 in) section width and a 45% aspect ratio, giving a 4.87-inch sidewall and a flotation-style size of about 29.7x10.8R20.

Its overall diameter is 29.74 inches, so it rolls 93.4 inches per revolution and turns about 678 times per mile.

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

Compare 275/45R20 with plausible swaps

• 245/60R18 vs 275/45R20 (−0.57%)
• 275/55R18 vs 275/45R20 (+0.56%)
• 235/65R18 vs 275/45R20 (+0.95%)
• 245/55R19 vs 275/45R20 (−0.45%)
• 275/50R19 vs 275/45R20 (+0.28%)
• 275/40R20 vs 275/45R20 (−3.64%)
• 255/45R20 vs 275/45R20 (−2.38%)
• 265/45R20 vs 275/45R20 (−1.19%)
• 305/40R20 vs 275/45R20 (−0.46%)
• 245/50R20 vs 275/45R20 (−0.33%)
• 275/45R20 vs 255/50R20 (+0.99%)
• 275/45R20 vs 285/45R20 (+1.19%)
• 275/45R20 vs 295/45R20 (+2.38%)
• 275/45R20 vs 275/50R20 (+3.64%)
• 275/45R20 vs 275/40R21 (−0.28%)
• 275/45R20 vs 245/45R21 (−0.21%)
• 275/45R20 vs 315/35R21 (−0.21%)
• 275/45R20 vs 285/40R21 (+0.78%)
• 275/45R20 vs 255/45R21 (+0.98%)
• 275/45R20 vs 315/30R22 (−1.02%)
• 275/45R20 vs 285/35R22 (+0.37%)
• 275/45R20 vs 255/40R22 (+0.97%)

Sizes within 3% of 29.74 in diameter

• 245/45R21 29.68 in (−0.21%)
• 315/35R21 29.68 in (−0.21%)
• 275/50R19 29.83 in (+0.28%)
• 275/40R21 29.66 in (−0.28%)
• 245/50R20 29.65 in (−0.33%)
• 285/35R22 29.85 in (+0.37%)
• 235/75R16 29.88 in (+0.45%)
• 245/55R19 29.61 in (−0.45%)
• 265/70R15 29.61 in (−0.46%)
• 305/40R20 29.61 in (−0.46%)
• 275/55R18 29.91 in (+0.56%)
• 245/60R18 29.57 in (−0.57%)
• 245/65R17 29.54 in (−0.69%)
• 235/70R17 29.95 in (+0.70%)
• 265/60R17 29.52 in (−0.75%)
• 285/40R21 29.98 in (+0.78%)
• 245/70R16 29.50 in (−0.81%)
• 275/60R17 29.99 in (+0.83%)
• 30x9.50R15 30.00 in (+0.86%)
• 245/75R15 29.47 in (−0.93%)
• 235/65R18 30.03 in (+0.95%)
• 255/40R22 30.03 in (+0.97%)
• 255/45R21 30.04 in (+0.98%)
• 255/50R20 30.04 in (+0.99%)
• 255/55R19 30.04 in (+1.01%)
• 255/60R18 30.05 in (+1.02%)
• 315/30R22 29.44 in (−1.02%)
• 255/65R17 30.05 in (+1.03%)
• 255/70R16 30.06 in (+1.05%)
• 265/50R19 29.43 in (−1.05%)
• 275/25R24 29.41 in (−1.11%)
• 265/45R20 29.39 in (−1.19%)
• 285/45R20 30.10 in (+1.19%)
• 235/60R19 30.10 in (+1.20%)
• 265/40R21 29.35 in (−1.34%)
• 235/45R21 29.33 in (−1.40%)
• 235/55R20 30.18 in (+1.46%)
• 265/35R22 29.30 in (−1.48%)
• 295/40R20 29.29 in (−1.52%)
• 225/75R16 29.29 in (−1.54%)
• 225/75R17 30.29 in (+1.83%)
• 295/40R21 30.29 in (+1.84%)
• 235/55R19 29.18 in (−1.91%)
• 265/40R22 30.35 in (+2.03%)
• 295/35R21 29.13 in (−2.06%)
• 235/60R18 29.10 in (−2.16%)
• 215/85R16 30.39 in (+2.17%)
• 265/45R21 30.39 in (+2.17%)
• 285/45R19 29.10 in (−2.17%)
• 305/35R22 30.41 in (+2.22%)
• 255/70R15 29.06 in (−2.32%)
• 265/50R20 30.43 in (+2.32%)
• 255/65R16 29.05 in (−2.33%)
• 255/60R17 29.05 in (−2.34%)
• 255/55R18 29.04 in (−2.36%)
• 255/50R19 29.04 in (−2.37%)
• 255/45R20 29.04 in (−2.38%)
• 295/45R20 30.45 in (+2.38%)
• 255/40R21 29.03 in (−2.40%)
• 235/65R17 29.03 in (−2.41%)
• 255/35R22 29.03 in (−2.41%)
• 245/75R16 30.47 in (+2.44%)
• 265/55R19 30.48 in (+2.46%)
• 245/70R17 30.50 in (+2.55%)
• 285/40R20 28.98 in (−2.58%)
• 265/60R18 30.52 in (+2.61%)
• 295/30R22 28.97 in (−2.61%)
• 235/70R16 28.95 in (−2.66%)
• 245/65R18 30.54 in (+2.67%)
• 265/65R17 30.56 in (+2.75%)
• 265/70R16 30.61 in (+2.90%)
• 235/75R15 28.88 in (−2.91%)
• 245/55R20 30.61 in (+2.91%)
• 285/35R21 28.85 in (−2.99%)

Open 275/45R20 in the tire size calculator

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