The haibike sduro nduro rx 650b electric mountain bike 2016 is a true go anywhere electric mountain bike boasting an incredible set of components and a top notch frame alongside the newly improved yamaha electric bike system the haibike sduro nduro rx will help you master a wide variety of terrains regardless of whether it39s tailored towards all mountain free ride or downhill disciplines the brand new yamaha system offers a powerful 250w set up that provides up to a staggering 280