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Compare two tyre diameters, ground-clearance change and real speed at a displayed speed. Every parameter that affects the result remains visible.

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sidewall = width × aspect ratiodiameter = rim inches × 25.4 + 2 × sidewallreal speed = indicated speed × new diameter / old diameterWorked example
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Compare two tyre diameters, ground-clearance change and real speed at a displayed speed. The deterministic model uses only explicit inputs and documented constants.