Ride frequency (Hz) from corner weight, spring rate and motion ratio.
The static weight carried by this corner, in kg.
Spring rate in N/mm and the motion ratio of the suspension (1.0 if the spring is at the wheel).
Ride frequency in Hz is the standard way to compare and balance suspension stiffness.
The natural bounce frequency of a corner of the car, in Hz. It is the engineer-friendly way to express stiffness because it accounts for both spring rate and the weight on that corner.
Roughly 1.0-1.5 Hz for comfortable road cars, 1.5-2.5 Hz for sporty road and track cars, and 2.5-5 Hz for downforce race cars. The front is usually set slightly softer than the rear for stability.
How much the spring compresses for a given wheel movement. A motion ratio below 1.0 means the spring sees less travel than the wheel, so the effective wheel rate is lower than the spring rate.
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