How it works

TireFlows

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Result

Diameter

32.01"

Calculated from size marking (math only) — not a fitment guarantee. How it works

Alternate Tire Sizes

Closest diameters (math only · same rim · within 3%)

Tap a size to compare it with your current size

285/55R20+1.05%295/50R20-1.23%315/50R20+1.23%325/45R20-1.54%295/55R20+2.4%285/50R20-2.46%325/50R20+2.46%315/45R20-2.64%
Width 12.01 ″Rim 20 ″Dia. 32.01 ″6.00 ″Revs/Mile 630.1Circum. 100.6″
Diameter32.01"
Width12.01"
Sidewall6"
Circum.100.556"
Revs/Mile630.1

How results are calculated

Tire dimensions are calculated from the metric size format (width / aspect ratio / rim diameter). Diameter, circumference, and revolutions per mile are derived mathematically — no fitment or vehicle data is used.

The 3% rule is a general reference for acceptable diameter difference, not a guarantee. Always check your vehicle manual or consult a tire professional.

How it works