It didn't come from there. The mountain bike came from users, came from young users, particularly a group in Northern California, who were frustrated with traditional racing bikes, which were those sort of bikes that Eddy Merckx rode, or your big brother, and they're very glamorous.
実際にマウンテンバイクを 発明したのはカリフォルニアの若者達です 皆さんの兄さん達が 乗っていたようなレース用の自転車には 派手過ぎて興味が湧かず