Adventure Is Out There Brand new for 2017, Haibikes s Duro Cross 4.0 is a versatile electric hybrid bike built for the everyday long distance rider looking to explore all terrains on a womens specific frame. Here to transform cycling as you know it, the s Duro Cross 4.0 will revolutionise your ride thanks to its lightweight but sturdy Aluminium 6061 Hydroformed Frame, impeccably powered by a Yamaha PW 250 Watt Drive Unit & a 400 Wh Yamaha Lithium Ionen Battery. Featuring a pair of reliable Tektro HD-M285 Brakes & a dynamic Shimano Acera 9-Speed Drivetrain, the Cross 4.0 is a versatile, all weather, power-assisted machine. The Haibike s Duro Cross 4.0 is here to catapult you into a new level of all-purpose riding & it is brand new for 2017. Aluminium 6061 Hydro Formed Frame SR Suntour NRX D-LO 75mm Fork Shimano Acera 9-Speed Drivetrain Tektro HD-M285 Brakes Yamaha PW 250 Watt Drive Unit Description by James Caine, Rutland Cycling e Commerce Team.