The outstanding feature of Kalkhoff's Integrale series is the elegant integration of its powerful battery into the down tube of the frame. In combination with the powerful Impulse Evo RS engine, Kalkhoff engineers have created pioneering pedelecs and S-pedelecs that invite you to go on extended tours or commute to work sans traffic jams. Other innovative parts have also been stylishly integrated into this  harmonious concept. Whether you opt for the low-maintenance version with belt drive and hub gears or as the derailleur gear version, Kalkhoff's inspiring Integral series will make your e-bike heart beat faster and get you to your destination quickly and safely - no matter the weather.​