there is a Jeepbikes.com
The one I was looking at only weighed 37lbs, which is getting heavy. maybee 78lbs is a misprint, or maybe its a training bike. You would train on the 78lb bike then for the race you would switch to the 28lbs one. Maybee that 78lbs one would need duel tires, LOL.
I still think the cheap models that were sold at sears gave the company a bad name. the wanted to have a bike for EVERY price range.