The Haibike SDURO HardSeven 4.0 Electric Bike 2017 is the perfect choice for those looking for an eBike for XC/Trail terrain and long distance touring. With an entry level build that incorporates a set of great value components without having to compromise on quality. Haibike SDURO HardSeven 4.0 2017 Features 100mm Front Travel Yamaha Drive Unit 27.5 Wheels SDURO HardSeven 4.0 2017 Spec Highlights SR Suntour XCM RL-DS forks Shimano Acera 9-speed drivetrain Tektro HD-M285 hydraulic disc brakes Rodi FW Disc wheels with Schwalbe Smart Sam tyres Haibike SDURO HardSeven Technology Highlights SkidPlate Gravity Casting Interface Integrated Motor Concept Yamaha PW Drive Unit Yamaha LED Display Yamaha PW Drive Unit & LED Display The Yamaha PW unit is proven to be a powerful and reliable motor. Thanks to its Zero-Cadence system, it supports the rider from the first revolution of the crank. As one of the few motors available allowing a dual chainring, the Yamaha system is able to offer a broad range of gears providing more gear options out on the trails.Given its high maximum torque of up to 80Nm, its compact size, and its low noise, the Yamaha PW is one of the best eBike systems for sporty use. A compact yet robust Yamaha LED display and remote unit provide all the essential information, including the selection and display of support levels and the remaining range.