I forgot to mention there is a six-speed Dahon Yeah advertised on the Camping World website. The Dahon Yeah appears to be produced by another company called Yeah! Bicycles by Dahon's suppliers in China, Taiwan, or Macau using Dahon-licensed technology. See http://www.yeahbikes.com . It has a Shimano thumb shifter and track dropouts, i.e. short horizontal dropouts.

Has anyone had experience with one of these?