Tyre Size Calculator
Decode tyre size code — e.g. 205/55R16 — and get full dimensions.
Tyre code 205/55R16: 205 = width (mm), 55 = aspect ratio (sidewall = 55% of width), R = radial, 16 = rim diameter (inches). Changing tyre size affects speedometer accuracy. Check your vehicle manual for approved tyre sizes; the overall diameter should stay close to the original.
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