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.
La bicicleta de montaña viene de los usuarios; vino de usuarios jóvenes, particularmente de un grupo del norte de California, que estaban frustrados con las bicicletas de carreras tradicionales, que eran el tipo de bicis que Eddy Merckx montaba, o tu hermano mayor, y que eran muy glamorosas.