Do you have a TracRac on a short bed truck and haul anything over 8ft? or Do you have a TracRac on a long bed, but haul cargo over 10ft? The TracRac Cantilever Extension is the accessory for you. The Cantilever mounts to the crossbars and provides 32" additional inches of protection for your cab. The genius of this system is that it still allows for all of the flexibility of the Sliding TracRac System while protecting your cab from potentially unstable loads.