Unlike its progenitors, the Klunker proved incapable of withstanding hard off-road use, and after an unsuccessful attempt to reintroduce the model as the Spitfire 5, it was dropped from production. Another problem was Schwinn’s failure to design and market its bicycles to specific, identifiable buyers, especially the growing number of cyclists interested in road racing or touring. Instead, most Schwinn derailleur bikes were marketed to the general schwinn mountain bike leisure market, equipped with heavy “old timer” accessories such as kickstands that cycling aficionados had long since abandoned. More and more cyclists, especially younger buyers, began to insist on stronger steel alloys (which allowed for lighter frames), responsive frame geometry, aluminum components, advanced derailleur shifting, and multiple gears.[8][30] When they failed to find what they wanted at Schwinn, they went elsewhere.
Mountain bikes were originally based on Schwinn balloon-tired cruiser bicycles fitted with derailleur gears and called “Klunkers”. A few participants began designing and building small numbers of mountain bikes with frames made out of modern butted chrome-molybdenum alloy steel. When the sport’s original inventors demonstrated their new frame design, Schwinn marketing personnel initially discounted the growing popularity of the mountain bike, concluding that it would become a short-lived fad.[39] The company briefly (1978–1979) produced a bicycle styled after the California mountain bikes, the Klunker 5. Using the standard electro-forged cantilever frame, and fitted with five-speed derailleur gears and knobby tires, the Klunker 5 was never heavily marketed, and was not even listed in the Schwinn product catalog.
The company’s next answer to requests for a Schwinn mountain bike was the King Sting and the Sidewinder, inexpensive BMX-derived bicycles fabricated from existing electro-forged frame designs, and using off-the-shelf BMX parts. This proved to be a major miscalculation, as several new United States startup companies began producing high-quality frames designed from the ground up, and sourced from new, modern plants in Japan and Taiwan using new mass-production technologies such as TIG welding. At the time, most bicycle manufacturers in the United States sold in bulk to department stores, which in turn sold them as store brand models.
In reality, mass-market French manufacturers such as Peugeot were not infrequently criticized for material and assembly quality — as well as stagnant technology — in their low- and mid-level product lines. Nevertheless, Peugeot proudly advertised its victorious racing heritage at every opportunity. By 1979, even the Paramount had been passed, technologically speaking, by a new generation of American as well as foreign custom bicycle manufacturers. By the late 1970s, a new bicycle sport begun by enthusiasts in Northern California had grown into a new type of all-terrain bicycle, the mountain bike.
Over the years, Schwinn has empowered millions of people, earning a special place in the hearts and minds of generations of riders. We have spent over a century building the bicycle industry into what it is today, and we’re not done yet. In the late 1960s, the Varsity and Continental pioneered the use of auxiliary brake levers, which allowed the rider to rest hands on the straight, horizontal center section of the ram’s horn handlebars, yet still schwinn bicycles have braking control. To further improve control from this more-erect riding position, the levers used to move the derailleurs (shifting the chain from one sprocket to the next) were moved from the traditional position on the “down tube” to the top of the headset, on a ring which would turn with the handlebar stem. This feature, attractive to older riders, soon found its way to other Schwinn models, especially those intended for senior citizens.