With the new ebike, smart is presenting its second idea for locally emission-free electric mobility on two wheels. The trend-setting electric bicycle study, will be premiered at the Paris Motor Show 2010 together with the highly regarded smart escooter is suited for both effortless city biking and sporty use.
Plug and play: insert smartphone – and off you go! The smart drive kit app that has been further developed also performs numerous functions for the ebike, for example those of a speedometer and a navigation system.
The high-tech ebike is simple to operate without conventional gear shifting. It delivers extra power when the rider pedals. The muscle power-electric hybrid drive offers four power levels. At the same time it is great for a sporty workout: the electric drive integrated in the rear wheel does not offer unlimited assistance and is automatically cut off at 25 km/h, therefore, no driving licence or insurance is needed.
The smart ebike weighs approximately 22 kilograms, making the smart among the electric bicycles one of the lightweights in its segment. The rear wheel is suspended by large and accordingly sturdy aluminium profiles, which means that there is no need for the supporting struts usually found in the rear wheel area of other bicycles. Technical components such as Bowden wires or cables are not visible and this contributes to the harmonious and clear overall impression.
The dynamic look is rounded off by filigree 26 inch lightweight wheels with six double spokes which enhance ride comfort thanks to good intrinsic damping, and can also cope well with rough road surfaces or a "short cut" over a kerb.
The smart ebike was designed and realised in cooperation with the Berlin e-bike manufacturer GRACE.
The front headlamp, which is not fitted on the frame but rather integrated in the handlebar, provides for greater active safety. It has the same effect as active curve illumination on cars: the state-of-the-art full LED headlamp follows every steering movement and ensures the best possible illumination of the area in the direction of travel. This solution – like the LED rear lamp integrated in the underside of the saddle – also adds to the pleasing aesthetics as these two mounted parts are positioned so elegantly that they do not interrupt the overall styling.
The electric "booster" is a 250 watt brushless direct current wheel hub motor that is integrated in the rear wheel. The propulsion current is stored in a compact lithium-ion battery with voltage of 36 volts and capacity of 9.6 Ah. The charge socket for the battery charger is located below the pedal-crank bearing. The ebike can be charged at any normal household socket – just like a notebook. The battery can be fully charged in two to three hours. The energy recuperated during braking is stored in the battery during the journey.
There is a choice of four power levels with the fourth and strongest level providing maximum pushing power. Depending on the level of assistance the bike has a range per battery charge of 30, 50, 70 or 90 kilometers – more than ample for the distances covered in everyday use. The gear ratio is automatically adjusted in two levels depending on the speed. The maximum speed depends on the terrain and the energy expended by the rider. At a speed of more than 25 kilometres per hour the electric drive automatically stops providing assistance – and the ebike becomes a pure “muscle bike”.
The front and rear wheels are each equipped with a state-of-the art hydraulic disc brake for safe and efficient braking. In addition, the rear wheel is braked "electrically" via the resistance of the wheel hub motor.