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Front Bypass And Coilover

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The shock is positioned a good ways in from the wheel on this desert truck, so wheel travel will be far greater than actual shock travel. In this case, the effective (reduced) spring rate at the wheel is D1/D2 multiplied by the spring rate of the coil spring. Where you may see a front live axle coil rated at about 300 lb/in, an IFS shock such as this may have a coil spring with a rating about double, or 600 lb/in.