FC RX820 1 GRX 40T 12 Speed Single 1X Chainring

Shimano's class leading chainrings offer the optimum balance of light weight and rigidity for precise shifts even under high loadsFeaturing a thick thin chainring teeth profile to give you better chain retention and smoother pedalling in the toughest and muddiest of conditionsDesigned to work with Shimano’s 12-speed HG+ chain providing more efficiency and improved power transferGenuine 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