SpringRate: Suspension Calc

About

SpringRate converts between spring rate, wheel rate and ride frequency so you can dial in a suspension setup with real numbers. Enter spring rate, motion ratio, spring angle and sprung mass to get wheel rate and ride frequency — or solve it backwards from a target frequency to the spring rate you need. Compare front and rear to set your ride-frequency spread. FEATURES • Wheel rate = spring rate x motion ratio squared x cos(angle) • Ride frequency from wheel rate and sprung mass • Reverse solve: target frequency to required spring rate • Front/rear frequency spread (flat-ride) • Metric (N/mm, kg) or imperial (lbf/in, lb) • Save your setups 100% offline. No ads. No tracking. No account. A one-time purchase.