A couple of months ago I was riding my recumbent bike on the Natchez Trace ( no engine on this one) and I could see a df bike gaining on me. I had about 1 mile left on the trace so decided to see if I could keep him from catching me. It was a very slight down grade and i shifted into my 52-11 gear and did the best I could. He finally caught me when I stopped for traffic at the end of the trace. It was a guy on a motor bike that I knew. He said that he thought I had a motor since he couldn't catch me. But I couldn't do that for even 5 miles though. TOO OLD AND NOT ENOUGH WIND.