Tire Size Calculator — Darklink

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Tire Size Calculator

Unit system

Current size

Size as a string (e.g., 205/55 R16)

Width Width units Aspect ratio (%) Rim diameter (inch)

New size

Size as a string (e.g., 205/55 R16)

Width Width units Aspect ratio (%) Rim diameter (inch)

Result: —

Diameter = 2 × (width × aspect/100) + rim × 25.4; circumference = π × diameter; speedometer error = (new/current − 1) × 100%; clearance change = (new − current)/2.