When designing the specialized turbo levo fsr expert 6fattie electric mountain bike 2017 specialized started by building a trail bike with all the hallmarks that our mountain bikes are known for while streamlining the design for full integration of turbo technology the specialized mountain bike offers 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 po