Xlobsterman
Cruisin' on my Bluebird
Do you think he meant the Klunker 5? It had the name, so at least they had heard of the concept. Although come to think of it, Schwinn called the King Sting an "All Terrain Bike", and the Klunker 5 never made it into the catalog. I'd say the 1983 Sierra was their first real mountain bike.
The King Sting was their first production MTB with the BMX flair as were most of the the MTB in the early days. The 83 Sierra you mentioned was almost the same as the Sidewinder, and still listed as an ATB in the catalog. The bikes slowly evolved into what most people perceive as a MTB with cantilever brakes, and those funky triangle handle bars that I never really liked............LOL