When the Pivot Mach 429 showed up at trail heads, it was one of the first 29ers to arrive with the well-established, DW-Link rear suspension design. Already proven, with multiple World Cup wins, and possessing years of field testing and refinement, this approach to motion dynamics shook up the full-suspension 29er market. Fast forward five years from those early 429s, and they're stepping aside for the new age of the Mach 429 Carbon Mountain Bike Frame. And while the Mach 429 soldiers on as an unfailing workhorse, the only things shared between it and the 100mm-travel, 429 Carbon are nomenclature and wheel size. The new 29er top-dog at Pivot features a revised DW-Link design, a fresh geometry, and a new carbon chassis that builds on the expertise gained from the groundbreaking Mach 5. 7 Carbon. Pleasing to the eye, this fresh chassis' sweeping curves and smooth tube junctures aren't the result of some industrial designer's whimsical drawings. Instead, after two years of development, it's a classic case of form following function. The shape is a result of Pivot's exclusive hollow box, high-compression, internal molding technology. This allows for greater compaction of the fibers and resin and smoother internal walls that produce a lighter, stronger, and highly optimized frame design. The end result is a focus on the revised DW-Link design for unparalleled chassis strength and stiffness. The most obvious change to this iteration of the DW-Link is found at the upper link. It's now mounted lower, and it's packaged more compactly. This reduces flex in the link, and it lessens play from dimensional tolerances. But, the revised link plays a much greater role in the whole 29er picture. The tighter packed upper link permits a smaller, stiffer rear triangle and lower shock mounting. This effectively translates into chainstays that are close to a centimeter shorter, and a stand over height that grants an inch-and-a-half more breathing room. Because of these two changes a...