Given the implications of its mythological mascot's large footprints, it's little surprise that Yeti Cycles is among the first manufacturers to adopt the new, stiffer, extra wide Boost rear hub standard. It's also a given that, of the venerable brand's stable, the first model to make use of it would be the SB6 Carbon Mountain Bike Frame, easily recognizable on enduro podiums the world over as Yeti's flagship sled. The only other change made to the SB6 between model years is an update to the shock, which sees the FOX CTD shock to the door in favor of FOX's DPS model. Other than that, the new SB6 remains shrouded in the same confusion. Is at a short DH bike' A plush backcountry explorer' All of the above' We aren't prepared to answer those questions, but we do know that this Yeti's large footprint and Switch Infinity suspension keep it glued to the earth, regardless of application. The Switch Infinity suspension system is a big reason why the SB6 is so versatile. Switch Infinity originally replaced the Switch Link design, which experiences a momentary harshness when rapidly successive hits kept it hovering above the 30% stroke point. The new design has a more linear travel arc, so the eccentric link changes direction without getting caught in that minute dead spot. Of course, 95% of all riders won't ever push the Switch Link hard enough to experience this dead spot, but Yeti being Yeti went ahead and fixed it anyway. For those of us who are our own mechanics, Yeti also simplified maintaining the Switch Infinity by including easily accessible grease ports, which do away with the need for time consuming rebuilds. Other than those two changes, the suspension systems are fairly similar. Like the Switch Link, the Switch Infinity slider travels upward under the first phase of compression, when the SB6 is settling into its sag point. As the rear end compresses deeper, the direction changes, and the DH inspired slider travels down toward the bottom bracket shell to mai...