Then Dan Empfield developed a bike specifically for the aerobar and for time trial and triathlon racing. His bikes were the first to use forward positioning and steep seat tube angles. Unfortunately, many athletes took this to an extreme. We saw frames with extremely steep seat tube angles – up to 90 degrees. I have to plead guilty here myself. On the wall at my office hangs a beautiful custom aero frame with an 83-degree seat tube angle, never raced and with a total of about a hundred miles on it. On the flats, I could fly, but a 1 degree incline became a huge climb.