265/35R21 tire size

A 265/35R21 tire is 28.30 in (718.9 mm) tall and 10.43 in (265.0 mm) wide, and turns 713 revolutions per mile.

28.30 inOverall diameter
3.65 inSidewall height
713Revolutions per mile
28.3x10.4R21Flotation equivalent

265/35R21 dimensions
Measurement	Inches	Millimeters
Overall diameter	28.30 in	718.9 mm
Section width	10.43 in	265.0 mm
Sidewall height	3.65 in	92.8 mm
Rim diameter	21.00 in	533.4 mm
Circumference	88.92 in	2,258 mm
Revolutions per mile	713
Flotation equivalent	28.3x10.4R21 (approx.)

265/35R21 is a 21-inch tire with a 265 mm (10.43 in) section width and a 35% aspect ratio, giving a 3.65-inch sidewall and a flotation-style size of about 28.3x10.4R21.

Its overall diameter is 28.30 inches, so it rolls 88.9 inches per revolution and turns about 713 times per mile.

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

Compare 265/35R21 with plausible swaps

Sizes within 3% of 28.30 in diameter

295/40R19 28.29 in (−0.04%)
225/75R15 28.29 in (−0.06%)
235/45R20 28.33 in (+0.08%)
265/40R20 28.35 in (+0.15%)
265/30R22 28.26 in (−0.15%)
235/50R19 28.25 in (−0.18%)
265/45R19 28.39 in (+0.31%)
225/70R16 28.40 in (+0.35%)
305/30R21 28.20 in (−0.35%)
235/55R18 28.18 in (−0.45%)
265/50R18 28.43 in (+0.46%)
295/35R20 28.13 in (−0.61%)
275/30R22 28.50 in (+0.68%)
205/75R16 28.11 in (−0.70%)
235/60R17 28.10 in (−0.71%)
285/45R18 28.10 in (−0.72%)
225/65R17 28.52 in (+0.75%)
245/65R16 28.54 in (+0.83%)
255/50R18 28.04 in (−0.93%)
255/45R19 28.04 in (−0.95%)
245/60R17 28.57 in (+0.96%)
255/40R20 28.03 in (−0.96%)
235/65R16 28.03 in (−0.97%)
255/35R21 28.03 in (−0.97%)
275/35R21 28.58 in (+0.97%)
255/30R22 28.02 in (−0.99%)
215/65R17 28.00 in (−1.06%)
245/55R18 28.61 in (+1.08%)
225/60R18 28.63 in (+1.15%)
285/40R19 27.98 in (−1.15%)
295/30R21 27.97 in (−1.18%)
245/50R19 28.65 in (+1.21%)
235/70R15 27.95 in (−1.24%)
275/40R20 28.66 in (+1.27%)
325/30R21 28.68 in (+1.32%)
245/45R20 28.68 in (+1.34%)
315/35R20 28.68 in (+1.34%)
215/75R16 28.70 in (+1.39%)
245/40R21 28.72 in (+1.46%)
285/30R22 28.73 in (+1.52%)
225/55R19 28.74 in (+1.56%)
275/45R19 28.74 in (+1.56%)
225/50R19 27.86 in (−1.57%)
285/35R20 27.85 in (−1.59%)
245/35R22 28.75 in (+1.59%)
215/70R16 27.85 in (−1.60%)
295/25R22 27.81 in (−1.75%)
245/30R22 27.79 in (−1.82%)
245/35R21 27.75 in (−1.95%)
285/35R21 28.85 in (+1.95%)
225/55R18 27.74 in (−1.98%)
275/45R18 27.74 in (−1.98%)
235/75R15 28.88 in (+2.03%)
245/40R20 27.72 in (−2.07%)
215/75R15 27.70 in (−2.14%)
245/45R19 27.68 in (−2.20%)
275/40R19 27.66 in (−2.27%)
235/70R16 28.95 in (+2.30%)
245/50R18 27.65 in (−2.32%)
295/30R22 28.97 in (+2.35%)
225/60R17 27.63 in (−2.38%)
285/40R20 28.98 in (+2.38%)
245/55R17 27.61 in (−2.45%)
235/65R17 29.03 in (+2.56%)
275/35R20 27.58 in (−2.56%)
255/35R22 29.03 in (+2.56%)
245/60R16 27.57 in (−2.57%)
255/40R21 29.03 in (+2.57%)
255/45R20 29.04 in (+2.59%)
255/50R19 29.04 in (+2.60%)
255/55R18 29.04 in (+2.62%)
255/60R17 29.05 in (+2.63%)
255/65R16 29.05 in (+2.64%)
255/70R15 29.06 in (+2.66%)
225/65R16 27.52 in (−2.78%)
285/45R19 29.10 in (+2.81%)
235/60R18 29.10 in (+2.82%)
275/30R21 27.50 in (−2.85%)
295/35R21 29.13 in (+2.92%)

Open 265/35R21 in the tire size calculator

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