GRX FD-RX820The GRX RX 820 F front derailleur offers lighter front shifting operation and easier setup thanks to the new link construction and integrated cable tensioner. It features a 2. 5 mm outboard chain line design to allow wider tire clearance for mixed terrain riding. GRX 12 speed front derailleur Ergonomic power curve gives natural stroke feeling Integrated cable tension adjustment Chainline +2. 5 mm vs. conventional road FD for added tire clearance, up
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