Super Springs SSF-111-54 Helper Spring Bellows; SumoSprings; 5 Inch Height; 4 In

SumoSprings are not made from rubber. They are a progressive spring with a very soft initial engagement. That means that as more weight added, the harder they get and more they push back, providing support and control when you need it without affecting the factory ride when unloaded. These are a suspension enhancement built to create a better journey.