kcnc Sistema de Roldanas Jockey Wheel Negras

Features kcnc sistema de roldanas jockey wheel negras

Features:

• For Shimano 10/11V Dura-Ace 9000 and Ultegra 6800, 11-speed derailleur. 
• With 2 14 +16T pulleys with specific narrow-wide teeth.
• Offers savings in transmission friction. 
• Compatible with: Shimano Dura-Ace 10v RD -7900-SS / Shimano Dura-Ace Di2 10v RD-7970-SS / Shimano Dura-Ace 11v RD-9000-SS / Shimano Ultegra Di2 10v RD-6770-SS / Shimano Ultegra 11v RD-6800-SS / Shimano Ultegra Di2 11v RD-6870-SS