The German automaker Audi now brings the same high-performance engineering and luxury touches found in its sports cars to the world of cycling with the 13-pound Audi Sport Racing Bike, presented at the 85th Geneva International Motor Show. Joining the ranks of other performance bicycles created by such competitors as Porsche and Aston Martin, Audi’s cycle was designed in cooperation with the German firm CarbonSports. The bike’s wheels and 27.9-ounce frame are made completely from T1000 carbon fiber—the materia…