Thread: 4 link question?

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Want to build a rear suspension similair to whats shown in the pic. One question I have is: wouldnt this set up be prone to binding? As the rear end moves up in travel wouldnt it want to pull the spring forward as theoretically the radius rods would get shorter? Another question I had: what is my initial setting for the 4 bar? My gut tells me leave one end loose. Set the car on the ground to load the spring and then hook up the 4 bars. Any thoughts appreciated. Im new to this so bear with me.