One of the highlights on the Audi stand this year’s Wörthersee automotive festival is the bicycle technology concept known as the Audi e-bike – a sport bike that does not fit into any of the usual categories. It is neither a pedelec nor a conventional bike, but is best described as a high-end pedelec made by Audi for sport, fun and tricks. The bike offers cool design, lightweight construction, networking and electric mobility. The 26-inch wheels are made from CFRP that weigh only 600 grams (1.32 lb) each and have innovative large-area blade-pattern spokes. The Audi e-bike Wörthersee’s ultra-light carbon-fiber frame weighs only 1,600 grams (3.53 lb). It makes use of bionic principles derived from nature. Material reinforcements are needed only at the points where loads actually occur. The swinging arm for the rear wheel is also made of CFRP. The peak output from the electric motor is 2.3 kW – a new top value on the e-bike scene. The complete bicycle weighs only 21 kg (46.30 lb), equivalent to a power-weight ratio of 9 kg (19.84 lb) per kilowatt, or 7 kg (15.43 lb) per horsepower – another record-breaking value.
The lithium-ion battery is housed in the frame; it weighs about 5 kg (11.02 lb) and operates at a voltage of 48 V. Its capacity is 530 Wh and it can be fully recharged from a 230 V supply in two and a half hours. As an alternative it can be easily detached from the bike and replaced by a recharged battery.
The bike offers a top speed of up to 80 km/h (50 mph) can be reached and the action radius is between 50 and 70 kilometers (31 and 44 miles). In ‘Wheelie’ mode the power flow is electronically controlled in order to assist the rider when the front wheel is in the air. Alternative operating modes are available, and can be selected by smartphone or directly at the e-bike: either ‘Power Wheelie’ with an adjustable wheelie angle for less skilled riders, or ‘Balanced Wheelie’ for those with more experience. In the latter mode the rider’s balance is maintained electronically: as his or her weight is displaced forward or back, this is counteracted by either braking or accelerating the electric motor.