Since its recent reveal, the SB6's accolades have been heaped up like so many rock gardens. Despite the acclaim it's received for its flagship enduro module, Yeti is riding roughshod over those accolades with the same disregard that the SB6 itself rides over literal rock gardens, updating the frame's chassis yet again with a 148mm Boost rear axle. The resulting SB6 Carbon X01 Complete Mountain Bike makes for an even stiffer, more climb happy enduro sled, and promises to continue the Colorado based manufacturer's inveterate habit of piling up critical praise. It also makes the ideal platform to showcase X01 the favored SRAM one by drivetrain around the Competitive offices and a Float Factory DPS, which is FOX's latest salvo in the shock wars. Despite the new axle standard, several key elements of Yeti's flagship bike return unchanged from the previous year. Not surprisingly, the Switch Infinity suspension system is one of them. The SB6's Switch Infinity originally replaced the Switch Link design, which experienced a momentary harshness when rapidly successive hits kept it hovering above the 30% stroke point. Switch Infinity replaces the Link's sinuous travel arc with a linear plane of motion, so the eccentric link changes direction without getting caught in the minute dead spot that produces that harshness. 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 tr...