Yakima Tonneau Kit 1 for Retrax and Other Retractable Truck Bed

tonneau covers with tslot tracks   Dan tonneau cover with t slot

Increased Cargo Capacity Above & Below the Cover Compatible with most T-slot accessories from Rhino Rack, Yakima, Thule, and many more Sealed ball-bearing

They basically won't work with a bed cover, That's why some covers have the T slot tracks on them It's so you can run both a cover and a rack  Trying to find a combination of Tonneau Cover and Rack per the following requirements

rummy slot Covers oil and oil filter changes, and tire rotations, Normal Integrated tonneau cover with T-slot utility tracks Not Engineered to fit your vehicle; Tonneau cover shields the cargo in your truck bed; Patented vinyl-over-aluminum construction for maximum strength and