RPM Roof Skid Rails X-Maxx - 80312RPM Roof Skid Rails for the X Maxx Quick Notes: Reduces roof damage from inverted slides Under body support plates for added pull through protection Let? s face facts. If you own an X Maxx, there? s a good chance you? re going to wind up on your roof and that 8. 6+ kg will rip through that thin lexan body in no time at all if you don? t find a way to protect it. That? s where RPM steps in! Our Roof Skid Rails are a simple add on that bolts to the roof