BAK Revolver X4s Hard Rolling Tonneau Cover for RAM 1500 DT Crew Cab

The key difference is that the X4TS includes integrated T-slot side rails for mounting compatible racks, crossbars, and cargo systems above the tub, while the X4s does not. Both use hard rolling aluminium slat construction, industrial-grade vinyl, and BAK's patented rotational locking rails. The X4s is a cleaner, lower-profile option for owners who do not need over-bed rack mounting. The X4s also features a matte-black aluminium underbody and integrated safety slat caps as standard.

The Revolver X4s is specifically designed to work with RAM 1500 DT Crew Cab models fitted with RAMBox. The cover is engineered to mount on the modified bed rail profile of a RAMBox-equipped truck. Access to the RAMBox side compartments is not blocked by the cover, though the angle that the RAMBox lids can open may be slightly reduced with the cover in place. If you use the RAMBox compartments heavily, it is worth confirming clearance with us before ordering.

The X4s uses BAK's patented rotational locking rail system combined with an automatic slam latch. As the cover reaches the closed position, the latch engages automatically from either side of the bed without needing a manual lock. A simple release from either side allows the cover to be rolled open again.

The kit includes the hard rolling cover with matte-black aluminium underbody, side rail extrusions, safety slat caps, rear corner caps, mounting hardware, and installation instructions. All core components are part of the cover assembly and no additional parts are required for a standard installation.

The X4s clamps onto the top of the bed rails and is generally compatible with drop-in liners and spray-on coatings applied below or up to the rail level. If a drop-in liner has a raised outer flange that sits above the rail surface, it can potentially affect clamp fitment. We recommend confirming with us before ordering if you have a thick aftermarket liner already installed.

The X4s is designed to reduce water and dust intrusion using matte-finished industrial-grade vinyl, a flat side seal design, and an integrated bulkhead seal. Like any hard rolling cover, it is intended to manage rather than eliminate ingress, particularly in sustained heavy rain or when washing at high pressure. Gear that needs to stay completely dry should be stored in sealed bags or containers.

Yes. When rolled, the X4s coils toward the cab and is held in position using the cover's buckle and strap system, allowing you to drive with the full bed exposed. Heavy-duty straps and buckles are included to keep the rolled cover secure while moving. Always confirm the cover is properly secured before driving with it in the open position.

The main practical difference is bed access style. A rolling cover like the X4s coils toward the cab and keeps the full rear opening clear when open, which is convenient for regular tailgate loading and maintains better rear visibility. A hard folding cover like the BAKFlip MX4 folds upward in sections, which allows you to drive in a partially-open position for taller gear but can partially obstruct rear visibility when fully open. If mounting over-bed racks is part of your setup, the X4TS variant with integrated T-slot rails is worth considering.