285/35R21 tire size

A 285/35R21 tire is 28.85 in (732.9 mm) tall and 11.22 in (285.0 mm) wide, and turns 699 revolutions per mile.

• 28.85 inOverall diameter
• 3.93 inSidewall height
• 699Revolutions per mile
• 28.9x11.2R21Flotation equivalent

285/35R21 is a 21-inch tire with a 285 mm (11.22 in) section width and a 35% aspect ratio, giving a 3.93-inch sidewall and a flotation-style size of about 28.9x11.2R21.

Its overall diameter is 28.85 inches, so it rolls 90.6 inches per revolution and turns about 699 times per mile.

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

Compare 285/35R21 with plausible swaps

• 245/50R19 vs 285/35R21 (−0.72%)
• 225/55R19 vs 285/35R21 (−0.38%)
• 275/45R19 vs 285/35R21 (−0.38%)
• 255/50R19 vs 285/35R21 (+0.64%)
• 285/45R19 vs 285/35R21 (+0.85%)
• 275/40R20 vs 285/35R21 (−0.67%)
• 245/45R20 vs 285/35R21 (−0.60%)
• 315/35R20 vs 285/35R21 (−0.60%)
• 285/40R20 vs 285/35R21 (+0.42%)
• 255/45R20 vs 285/35R21 (+0.63%)
• 265/35R21 vs 285/35R21 (−1.91%)
• 275/35R21 vs 285/35R21 (−0.96%)
• 325/30R21 vs 285/35R21 (−0.61%)
• 245/40R21 vs 285/35R21 (−0.48%)
• 285/35R21 vs 255/40R21 (+0.61%)
• 285/35R21 vs 295/35R21 (+0.96%)
• 285/35R21 vs 285/40R21 (+3.89%)
• 285/35R21 vs 275/30R22 (−1.24%)
• 285/35R21 vs 285/30R22 (−0.42%)
• 285/35R21 vs 245/35R22 (−0.35%)
• 285/35R21 vs 295/30R22 (+0.40%)
• 285/35R21 vs 255/35R22 (+0.60%)

Sizes within 3% of 28.85 in diameter

• 235/75R15 28.88 in (+0.08%)
• 235/70R16 28.95 in (+0.34%)
• 245/35R22 28.75 in (−0.35%)
• 225/55R19 28.74 in (−0.38%)
• 275/45R19 28.74 in (−0.38%)
• 295/30R22 28.97 in (+0.40%)
• 285/40R20 28.98 in (+0.42%)
• 285/30R22 28.73 in (−0.42%)
• 245/40R21 28.72 in (−0.48%)
• 215/75R16 28.70 in (−0.55%)
• 235/65R17 29.03 in (+0.60%)
• 245/45R20 28.68 in (−0.60%)
• 315/35R20 28.68 in (−0.60%)
• 255/35R22 29.03 in (+0.60%)
• 325/30R21 28.68 in (−0.61%)
• 255/40R21 29.03 in (+0.61%)
• 255/45R20 29.04 in (+0.63%)
• 255/50R19 29.04 in (+0.64%)
• 255/55R18 29.04 in (+0.65%)
• 255/60R17 29.05 in (+0.67%)
• 275/40R20 28.66 in (−0.67%)
• 255/65R16 29.05 in (+0.68%)
• 255/70R15 29.06 in (+0.70%)
• 245/50R19 28.65 in (−0.72%)
• 225/60R18 28.63 in (−0.78%)
• 245/55R18 28.61 in (−0.85%)
• 285/45R19 29.10 in (+0.85%)
• 235/60R18 29.10 in (+0.86%)
• 275/35R21 28.58 in (−0.96%)
• 295/35R21 29.13 in (+0.96%)
• 245/60R17 28.57 in (−0.97%)
• 245/65R16 28.54 in (−1.09%)
• 235/55R19 29.18 in (+1.12%)
• 225/65R17 28.52 in (−1.17%)
• 275/30R22 28.50 in (−1.24%)
• 265/50R18 28.43 in (−1.46%)
• 225/75R16 29.29 in (+1.50%)
• 295/40R20 29.29 in (+1.51%)
• 265/35R22 29.30 in (+1.56%)
• 225/70R16 28.40 in (−1.57%)
• 265/45R19 28.39 in (−1.61%)
• 235/45R21 29.33 in (+1.64%)
• 265/40R21 29.35 in (+1.71%)
• 265/40R20 28.35 in (−1.76%)
• 235/45R20 28.33 in (−1.83%)
• 265/45R20 29.39 in (+1.86%)
• 265/35R21 28.30 in (−1.91%)
• 275/25R24 29.41 in (+1.94%)
• 295/40R19 28.29 in (−1.95%)
• 225/75R15 28.29 in (−1.96%)
• 265/50R19 29.43 in (+2.01%)
• 315/30R22 29.44 in (+2.03%)
• 265/30R22 28.26 in (−2.06%)
• 235/50R19 28.25 in (−2.09%)
• 245/75R15 29.47 in (+2.13%)
• 245/70R16 29.50 in (+2.25%)
• 305/30R21 28.20 in (−2.25%)
• 265/60R17 29.52 in (+2.31%)
• 235/55R18 28.18 in (−2.35%)
• 245/65R17 29.54 in (+2.37%)
• 245/60R18 29.57 in (+2.50%)
• 295/35R20 28.13 in (−2.51%)
• 205/75R16 28.11 in (−2.59%)
• 265/70R15 29.61 in (+2.61%)
• 235/60R17 28.10 in (−2.61%)
• 305/40R20 29.61 in (+2.61%)
• 285/45R18 28.10 in (−2.62%)
• 245/55R19 29.61 in (+2.62%)
• 245/50R20 29.65 in (+2.74%)
• 275/40R21 29.66 in (+2.80%)
• 255/50R18 28.04 in (−2.82%)
• 255/45R19 28.04 in (−2.84%)
• 255/40R20 28.03 in (−2.85%)
• 235/65R16 28.03 in (−2.87%)
• 255/35R21 28.03 in (−2.87%)
• 245/45R21 29.68 in (+2.87%)
• 315/35R21 29.68 in (+2.87%)
• 255/30R22 28.02 in (−2.88%)
• 215/65R17 28.00 in (−2.95%)

Open 285/35R21 in the tire size calculator

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