Tire Size Calculator

Instantly calculate the diameter, circumference, sidewall height and revolutions per km of your tire size (e.g. 205/55R16).

Tire Size205/55R16

Width (mm)Aspect Ratio (%)Rim Diameter (in)

Diameter

631.9 mm

24.88 in

Sidewall Height

112.8 mm

Circumference

1985.2 mm

Section Width

205 mm

8.07 in

Revs / km

503.7

Rim Diameter (in)

R16

406.4 mm

→ Tire Size Comparison

Calculations use nominal dimensions; actual measurements can vary ±1–2% by manufacturer and model. Always follow your owner's manual and door-jamb placard.

205/55R16