Introducing the RetraxONE XR—Retrax’s rugged, manually retractable tonneau cover, blending the durable construction and effortless operation of the RetraxONE MX with Retrax’s T-slot-compatible Trax Rail System. The Trax Rail System integrates a T-slot-compatible rail at each bedside, accommodating T-slot accessories from most major manufacturers, like Yakima®, Thule®, and Rhino Rack®. With the ability to mount bikes, coolers, outdoor gear, and more on top of the bed cover, the Trax Rail System practically doubles your truck’s cargo capacity while freeing up the hitch and bed. Aside from the integrated T-slot rails, the RetraxONE XR shares all the hyper-popular features of the RetraxONE MX. Regarding construction, the RetraxONE XR sports a unique, one-piece, aluminum-reinforced polycarbonate construction that’s devoid of hinges, joints, or slats. Not only does this design look great, but it also eliminates typical operational issues from trapped dust, excessive wear, or frozen joints. | Retrax ONE XR Manual Retractable Tonneau Cover w/ T-Slot Rails T-60231