Keep your slide-out moving smoothly with the Lippert 115612 J-2 Roller Assembly, a direct OEM-style replacement for electric single rail above floor slide-out systems. Sized at 5.19 x 4.20 x 1.45 inches and weighing just 3 lbs, this roller drops in to restore proper slide operation and prevent wear on your room's floor seal and rail track.
In an electric single rail above floor slide-out system, the J-2 roller bears the load of the slide room every time it extends or retracts. When the roller wears, flattens, or cracks, you will notice grinding noises, uneven travel, increased motor strain, and potential damage to the slide seal and room frame. Replacing the roller early prevents cascading damage to the drive motor, rail, and room structure.
The Lippert 115612 is the correct replacement roller for J-2 geometry single rail systems, cross-referenced to both Keystone and Winnebago OEM part numbers, so you can confirm fitment against your coach's service records before you order.
Direct match for Keystone RV part 104111 and Winnebago part 20148401000, making fitment verification straightforward.
5.19 in. long x 4.20 in. wide x 1.45 in. tall -- sized to the J-2 assembly spec for accurate drop-in replacement without modification.
At 3 lbs, the assembly is easy to handle during installation, even in tight under-room access areas common to single rail systems.
Engineered specifically for electric single rail above floor slide-out systems -- not interchangeable with below floor or dual rail configurations.
In Lippert's electric single rail above floor architecture, the slide room rides on a horizontal rail mounted above the coach floor rather than concealed beneath it. The J-2 roller assembly supports and guides the room along this rail during extension and retraction. Unlike below floor systems where the mechanism is hidden in the subfloor cavity, above floor systems expose the rail inside the coach at floor level along the slide room's inner wall.
The J-2 designation refers to the specific roller bracket geometry used in this system family. Using the wrong roller profile -- even one that appears similar -- can cause misalignment, binding, and premature wear. Always confirm J-2 designation before ordering.
This roller assembly is used in a wide range of Lippert-equipped coaches from manufacturers including Keystone and Winnebago. If your slide-out was built on an electric single rail above floor system and your OEM documentation references Keystone part 104111 or Winnebago part 20148401000, the Lippert 115612 is the correct replacement.
Replacing a J-2 roller typically involves retracting the slide room fully, removing any interior trim panels that block access to the roller mounting points, unbolting the worn roller assembly, and installing the replacement. Lippert slide-out hardware generally uses standard SAE fasteners. Torque specifications and exact access procedures vary by coach model -- refer to your chassis documentation for fastener specs.