Information about Lotus Explorer bike?
I found this:


  Lotus Bicycles is/was based in Pennsylvania:
  
  Last known mailing address/telephone number below:
  
  Lotus Bicycles Post Office Box 21924 Lehigh Valley, Pennsylvania
  18002-1924
  +800-841-0123 Founded in 1979
  
  They had a website in 2000 : www.lotusbike.com but it is no longer
  registered/active. They manufactured bicycles &amp; frames for road &amp;
  track use.


From what I read it used to be a pretty good brand -- what one might buy if they were a dedicated amateur rider but not uber-rich.  But apparently they never made it out of the early 90s, when frame-building technology changed (and it became impossible to compete on price with the larger automated manufacturers).

Here is a web site on them:  http://www.vintagelotusbicycles.com/