Here are details I got back from the sales rep at Rhino Rack. Super guy - gave me tons of details. I really like the look of the Rhino 60". I don't think I want a full top rack - I'm not a serious enough user to warrant it. Here's his comments:
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Per the backbone you saw at SEMA, currently we are awaiting on the parts to be completed and ready to sell. Parts are already in process and this system will be available at the beginning of 2017. Right now no pricing has been confirmed yet. We imagine it to be on par with our FJ BackBone system with pioneer platform. With the 4-Runner BackBone, we will offer two different lengths of Pioneer Platform racks for integration. Part number 42100B is 60” in length and will be as long as the BackBone extrusion itself. Part number 42102B is 76” in length, so it will cantilever out a bit past the BackBone extrusion.
Please keep in mind though that what I am detailing above is specific for the BackBone extrusion (which will be available in Q1). In the meantime, we do currently offer our track system for the 4-Runner which mounts using dedicated fixed points on the vehicle once the elevated factory rails are removed. The nice thing about this track system is that it runs the entire length of the vehicle down to the windshield. (The BackBone stops about ¾ of the way down). With the track in place, customers can then mount our RTL600 track-mount legs and incorporate either crossbars, or one of the dedicated Pioneer Platform options. Part number 42107B is an 84” platform that can be used with the tracks because you can add legs closer to the front of the vehicle in the track to provide added support. This 84” platform will not work with the BackBone because there is no support up front. It would cantilever out 2’ past where the BackBone stops so there wouldn't be sufficient support for the front.
Bottom line is this:
BackBone
o More aesthetic
o Mounts using dedicated fixed points in the roofline
o (2) sizes of platforms available for mounting
o Available Q1 2017
Track System
o More functional
o Dedicated track for 4-Runner
o Mounts using dedicated fixes points in the roofline
o (3) sizes of platforms available for mounting
o Available now