When designing the specialized turbo levo fsr 6fattie electric mountain bike 2017 specialized started by building a trail bike with all the hallmarks that their mountain bikes are known for while streamlining the design for full integration of our turbo technology this means that you get a roomy top tube for an easy fit ultra short chainstays for nimble handling and a low bottom bracket that makes the bike feel glued to the trail then comes the efficient and powerful turbo technology mati