adventure Andes GiovanniMattiello Ground MTB SelleSanMarco A dream above the Andes: Giovanni Mattiello signs the first MTB descent from Cerro Mercedario Posted by Selle San Marco on 06.05.25 When the call of the mountains becomes a dream and the dream turns into an enterprise, stories like Giovanni Mattiello's are born: two bikers, a summit in the Andes and the legendary descent from Cerro Mercedario.