1990 Koga-Miyata Ridgerunner Alloy
In the late 80's and early 90's, bike companies were pushing the boundaries and challenging the preconceived notion that a mountain bike had to be built in the classic double diamond shape. The Japanese manufacturer, Koga-Miyata was among the companies challenging the norm. With 1990 World Champion Downhill racer Greg Herbold on the R&D team, they threw a lot of designs at the wall to see what stuck. This Ridgerunner Alloy was one of those designs. Mantis, Yeti, Breezer, among others, experimented with elevated chain stays but the Achilles heel of an elevated stay bike was the unsupported bottom bracket, thus creating an incredibly flexible frame. As shown in the photos, Koga-Miyata approached the problem with a sizable gusset welded from the bottom bracket to the down tube. This gusset made the Ridgerunner Alloy one of the sturdiest alloy elevated chain stay designs.