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Your cart is empty.The Rhino-Rack backbone is a mounting system for your Toyota 4Runner, allowing you to mount a Pioneer Platform on top. Strengthen your vehicle and mount a Pioneer Platform & increase your cargo capacity. The Backbone adds structural strength, enabling a higher roof load limit and improves cargo carrying capacity. The three mounting points on each side of the roof system add mountable capacity and weight distribution for a Rhino-Rack Pioneer Platform, Tradie or Tray. Designed to be stylish & aerodynamic to minimize wind drag and noise on the road. Single person installation. Instructions included, video also available online. All hardware included. We recommend adding the Rhino-Rack Pioneer Platform for maximum roof load area, sold separately. With over 90 accessories available. Rhino-Rack's Pioneer Platform offers the most expansive rooftop system on the market. From durable easy-to-use bike racks, kayak carriers, light bar brackets, load security & more, there's everything you need for your next adventure. to compliment and blend in with your vehicle's roof finish, for a stylish look. Made from strong & durable powder coated stainless steel for maximum performance and long life.