If you are using air springs on the rear of your vehicle and it is equipped with a top overload spring, you are probably unhappy with the amount of sway in the vehicle. This is because your air springs lifted the chassis up higher from the top overload springs, rendering them useless. The overload spring will not provide any benefit unless it is engaged. By filling that void with SuperStops, you’re allowing the overload spring to engage earlier. Once engaged, the SuperStops resist and have a progressive spring rate just like SumoSprings.