"Ed Huntress" wrote in message news:
A 2.0" x 0.035" 4130 tube is
pretty tough. I bet my life on this, every time I hit a bump at high
speed on this baby. http://mnhpva.org/meetings/Aug_02/Pumpkin.html

Wow, nice looking bike, Mark.

Thanks, I'm pretty pleased with it. Very comfortable, even by
recumbent standards, and efficient enough to make the most of my
meager power output.

Did you design it yourself?

Yes. Designing recumbents and recumbent accessories (and building
some of the accesories myself) is my part-time, semi-retirement
occupation. I make enough to support my bike and tool addictions.