The Shimano FC-4500 Tiagra 9 speed double chainrings are the perfect replacement for worn or damaged chainrings. Shimano's class leading chainrings offer the optimum balance of light weight and rigidity for precise shifts even under high loads. Designed to work with Shimano's 9-speed HG chain providing more efficiency and improved power transfer Genuine Shimano replacement chainrings for the FC-4500 Tiagra 9 speed chainset; available sizes 39T inner - Y1H639000
