With a lineage that extends more than three decades, the Coeur d'Acier is Serotta's smoothest riding, high-performance steel bike ever. Constructed entirely of Colorado Concept, butted, Columbus Niobium steel tubes, the Coeur d'Acier pays homage to how far steel and our custom technology have come. Lightweight, versatile, fully rider tunable and 100% handcrafted in the USA, this bike is second to none as the all around gold standard for any style of riding.