About the 275/55R20 Tire

The 275/55R20 is a common tire size for SUVs and crossovers such as Toyota RAV4, Honda CR-V, and Ford Explorer.

With a 151.3 mm sidewall (55% aspect ratio), this tire offers a balanced blend of ride comfort and handling precision — versatile for both city driving and spirited cornering.

Compared to the baseline 265/50R20, this tire's overall diameter differs by +4.9% — a speedometer calibrated for 265/50R20 would read 95.4 km/h at an actual 100 km/h.

When replacing, verify that your wheel well can accommodate the 810.5 mm overall diameter. Keep speedometer deviation within ±3% for safety and legal compliance.

Tire Measurements

Tire Code275/55R20
Section Width275 mm
Aspect Ratio55%
Rim Diameter20"
Sidewall Height151.3 mm
Overall Diameter810.5 mm / 31.91"
Circumference2546.3 mm / 100.25"
Revolutions per km392.7
Revolutions per mile632.0

Adjacent Size Comparison

Tire Code OD (mm)Δ mmΔ % Speedo at 100 km/h
275/45R20 755.5 -55.0 -6.8% 107.3
235/55R20 766.5 -44.0 -5.4% 105.7
275/55R20 (current) 810.5 — — 100.0

Frequently Asked Questions

What is the overall diameter of a 275/55R20 tire?
The overall diameter is 810.5 mm (31.91 in), with a 151.3 mm sidewall on a 20-inch rim.
How many revolutions per kilometer does a 275/55R20 tire make?
It makes 392.7 revolutions per kilometer, with a circumference of 2546.3 mm.
What vehicles commonly use 275/55R20 tires?
The 275/55R20 is standard OEM equipment on SUVs and crossovers such as Toyota RAV4, Honda CR-V, and Ford Explorer. Always check your owner's manual or door placard before switching sizes.

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