Shimano GRX FC-RX820-1 GRX 12 speed single 1X chainring, 42T black

The Shimano FC-RX820 GRX 12 speed single 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 Featuring a thick thin chainring teeth profile to give you better chain retention and smoother pedalling in the toughest and muddiest of conditions Designed to work with Shimano’s 12-speed HG+ chain providing more efficiency and improved power transfer Genuine Shimano replacement chainrings for the FC-RX820 1X cranksets available in 42T, and 40T manufactured from lightweight aluminium and with anodised teeth for increased durability Shimano part numbers: 42T - Y0SB98020, 40T - Y0SB98010 Compatible chain Shimano HG+ 12-speed