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SHIMANO XTR SHADOW PLUS derailleur for trail usage
A new addition to the SHIMANO XTR Dyna-Sys drivetrain is the RD-M985 SHADOW RD + rear derailleur. It features a switch at the pulley cage to enforce a heavier spring tension and activate a friction stabilizer to counteract the forces of up and down chain momentum in rough terrain.

Chain bouncing can often cause noise as the chain slaps the top and bottom of the chain stay, or even derail from the front chain ring in extreme circumstances.

The switch when selected to the “ON” position dampens the cage and consequent chain movement for a nearly silent and stable riding experience. In the “OFF” position it eases the installation and removal of the rear wheel by relaxing the spring tension of the cage.

Availability in the market: June 2011