The Behemoth Plus is an awesome ride. It crawls up steep ascents, bombs down rocky descents, feels stable and in control on slow technical moves, and eats up rocks for dinner. You will feel at your best every time you ride the Behemoth Plus (Fatass). The Behemoth can be built as a 29+ or 27.5+. The chainstay is a little longer for the Fatass version than the standard Behemoth. The Fatass chainstay length is 17.125″ on a 29plus. This Lenz Bike is also very versatile. It can be built with either 4 inch or 5 inch travel simply by swapping out the rocker arms, and it is compatible with many different forks. The geometry is great for climbing, descending, and general aggressive trail riding. Click here to view the Behemoth details and geometry.