Audi has turned its attention from four wheels to two with the unveiling of the Wörthersee e-bike, a prototype sports bike which the firm says “does not fit into any of the usual categories.”

The futuristic bike has at its core an ultra-light carbon-fiber frame weighing only 1,600 grams (3.53 lb).

Being so light, it’s a wonder the thing doesn’t take off when it hits its top speed of 50 mph (80 km/h). You read that right – when the Wörthersee e-bike’s electric motor kicks in, it can reach speeds of up to 50 mph, powering the rider for around 44 miles (70 km).

If a more a slightly more leisurely experience is preferred, simply ride the bicycle in pure mode, where pedal power alone will propel you forward. There are other modes too – eGrip also makes use of the electric motor, but will take you to a slightly-less-wind-in-your-hair speed of 31 mph (50 km/h). The rider’s speed is controlled using the bike’s twistgrip.

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