Happy you like our rock sliders. A bit of correction... these are TRUE Rock sliders. We tested a frame mounted system on the 1500 RAM frames and found the leverage with the longer mounting arms to the frame was too significant. We need to be able to pick up the vehicle with the rock slider and bounce it in our testing.
The huge leverage from mounting all the way to the frame was putting heavy torsional load on the frame and the frame was visibly was flexing and deflecting with our testing. Our liability carrier wouldn’t allow it to pass their engineering requirement. They felt, and we did too, that the frame could buckle or twist under a heavy impact, and that would lead your insurance to ‘total’ the vehicle.
Instead, we engineered this massively strong system which attaches to the reinforced collision panels on the outside of the RAM 1500's (and yes, the RHO and TRX as well). The reinforced collision panels have near the strength of the frame, but the leverage at impact is exponentially reduced. This ends up being a much safer rock slider system for the truck, best protection, incredibly strong as we can lift the vehicle off the ground with our kit while no other rock slider on the market has proven to do this.
Frame mounting is NOT always the best. On the surface it can seem to be, but when doing the actual load testing, it sometimes is not ideal. A few of the high end rock slider companies like ourselves, conduct the testing necessary to determine frame or collision panels. Many do not, sadly and just throw out a frame mount regardless of stresses to the frame and inclusive of leverage loads to the frame.
But to think that "frame mounting" is mandatory for a "true rock slider", is not correct. It depends on the vehicle, the frame, a number of factors.
Hope that helps!
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