We know that youre particular about how you build out your dream bike which is why we offer our revolutionary s works enduro fsr 650b as a frameset its constructed from our top tier fact is x 11m carbon fibre to keep the weight down while this material comes with the added benefit of being incredibly stiff however everything is kept in balance by our nimble 650b geometrys roomy top tube short chainstays slack head tube and longer wheelbase to ensure top level performance on the desce