Shimano drops new clutch Ultegra RD-RX800, trickle-down 105 components

Shimano's new Ultegra R8000 drivetrain includes the RX rear derailleur, which features a clutch mechanism for chain security. Read the full article at Shimano drops new clutch Ultegra RD-RX800, trickle-down 105 components on VeloNews.com .

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