Roll N Lock A-Series XT Locking Retractable Truck Bed Cover for 14-18 (19 Legacy/Limited) Chevy Silverado/GMC Sierra 1500/15-19 2500 HD/3500 HD 6' 7" Bed Model 221A-XT Mid-Roof and the wheels are designed

and the wheels are designed to handle various surfaces

8-Inch Length Model 48329

500 lbs Model 25153

UnderCover Armor Flex 19(NewBody)-24Silv/Sierra (w/oCarbonProBed)1500 6'7" w/ or w/o MultiPro TG Model AX12023

You can also cut this bracket to fit your specific underbody box

Roll N Lock A-Series XT Locking Retractable Truck Bed Cover for 14-18 (19 Legacy/Limited) Chevy Silverado/GMC Sierra 1500/15-19 2500 HD/3500 HD 6' 7" Bed Model 221A-XT Mid-Roof and the wheels are designedRoll N Lock A Series XT Locking Retractable Truck Bed Cover for 14 18 (19 Legacy Limited) Chevy Silverado GMC Sierra 1500 15 19 2500 HD 3500 HD 6' 7" Bed Model 221A XT The Roll N Lock A SERIES XT combines the all aluminum A Series retractable truck bed cover with our T slot integrated MaxTrak System that allows for unique customization to your truck bed to meet your individual needs. The Roll N Lock A XT provides you effortless full bed convenience