The all-terrain, all-day, bike. At the core of our MTB offering, the Atom series has been developed to offer the perfect balance of performance, value and comfort. 6000 series hydro-formed aluminum frames provide a light, responsive and stiff ride with just the right amount of vertical compliance to keep you comfortable in the saddle. Hydraulic disc brakes, SRAM and Shimano drive trains and lockout-equipped suspension are just some of the great features found on an Atom.