Set to debut at the 2012 Wörthersee Tour, the Audi e-bike Wörthersee is a sport bike technology concept that explores new limits in terms of design, lightweight construction, networking and electric mobility.
The prototype combines an electric drive and muscle power and features a futuristic design, a lightweight construction and an advanced connectivity system.
Each component of the electrically-assisted bike was created by Audi designers. The frame, swinging arm and wheels are made of carbon fiber.
The frame weighs only 1,600 grams and makes use of bionic principles derived from nature; the 26-inch wheels weigh 600 grams (1.32 lb) each and have large-area blade-pattern spokes.
The electric motor is a 2.3 kW permanent magnet synchronous machine; it is located at the lowest point on the frame and drives the bottom bracket shaft directly, delivering a maximum torque of 250 Nm.
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 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 hp.
The rider of the Audi e-bike Wörthersee can choose between five programs; these either support use of the pedals or permit electric-only travel.
The nine-speed hydraulically actuated gear shift has a very rapid sequential action, similar to the R tronic transmission in an Audi R8. The two disk brakes are also applied hydraulically.
Seat height can be continuously adjusted at a handlebar control, even while the bike is being ridden. The front fork uses the upside-down principle; it is air-sprung, with 130 mm (5.12 in) of travel. LEDs are used for powerful lighting: the front light is integrated into the handlebar, the rear light into the seat.
The Audi e-bike Wörthersee will be unveiled at this year’s Wörthersee Tour, the 31st meet for Audi, VW, Seat and Skoda fans; trial biker Julien Dupont and downhill specialist Petra Bernhard will demonstrate their stunts and streetbike skills.























