Hendrickson introduces the latest in air slider technology with the ULTRAA-K® axle suspension system – the next generation VANTRAAX® air slider system for the van and refrigerated trailer markets. Building on proven VANTRAAX air slider design expertise, the ULTRAA-K system is engineered with an optimized strength-to-weight ratio making it stronger than comparable standard and heavy duty 40K slider models in the market today. It is the lightest slider system in the industry by nearly 100 pounds.