Shimano Ultegra RX road clutch rear derailleur spotted

Shimano Ultegra RX road clutch rear derailleur spotted

Ahead of the cobble-filled Tour of Flanders, WorldTour squad Trek-Segafredo was testing a new Shimano Ultegra RX clutch rear derailleur, in mechanical and Di2 versions. Shimano is not yet talking about this clutch derailleur that works with two chainrings, but BikeRadar talked to Trek-Segafredo riders and staff about their experience with the product. Degenkolb shortens cranks, changes bar for cobbles Readers familiar with Shimano's Shadow Plus mountain bike derailleurs will recognize the technology: a switch, or 'clutch', flips the derailleur between a soft-spring setting and a firm-spring setting. The former works like a normal road derailleur; the latter pulls the chain tauter, reducing if not eliminating chain slap and the possibility of dropping a chain on rough terrain. The Tour of Flanders contains more than a dozen cobbled stretches, many on short but sharp climbs, or hellingen . Paris-Roubaix the following Sunday of course contains more numerous and more brutal ...

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