Extang Endure ALX - 22-26 Frontier 6'1" w/ or w/o Utili-Track System Model 80962Extang Endure ALX 22 26 Frontier 6'1" w or w o Utili Track System Model 80962 From tireless engineering and a relentless pursuit for perfection comes a low profile bed cover designed to function like no other the Endure ALX from RealTruck. With a flush mounted design, the Endure ALX creates a seamless, polished exterior appearance when closed while delivering highly functional full bed access when open. The Endure ALX features four patented