Send those skinny tired bikes into hibernation for the winter and get out in the snow with the 2016 Borealis Echo GX Complete Fat Bike. Borealis pairs a rigid carbon fiber fork and SRAM's one by eleven groupset to create a light, reliable, and versatile whip for the non suspension fat bike traditionalists out there who still want all the benefits of carbon design. Your other bikes are going to get some time off this cold season. The seatstay profiling on the Echo enables a degree of forgiving bump absorption, while the oversized chainstays keep the pedaling responsive when you stomp on the gas. Like the original Yampa, the Echo clears massive 4. 8in tires on a 100mm wide rim. To achieve that degree of clearance, Borealis opts for a 197mm spaced rear hub, which is secured by a Maxle quick release thru axle. The result is a dishless rear wheel, a surprisingly stiff rear end, and perfect drivetrain alignment with the 100mm threaded bottom bracket shell. The design also provides enough clearance for a one by or double drivetrain, regardless of your tire choice. Naturally, there's plenty of extra clearance for mud, snow, or anything else you're likely to find yourself riding through. The head tube is tapered, which takes advantage of the incredible stiffness provided by Borealis' rigid carbon fork. The frame's finished with a bike packing loadout of three bottle cage mounts to keep you hydrated for long hours in the saddle and, at 1,370 grams for a medium frame, it's far lighter than it appears.