SPV damping technology the Swinger 4-way allows the rider to set up a pedaling platform threshold, externally, via an air shock. Riders also have the ability to adjust how progressive the shock is with the 16-mm socket adjustment located on the reservoir. Turning the socket in results in a shock with more “ramp up” in the final 50% of its stroke (to prevent bottoming) while turning the socket out results in a more linear spring rate.