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Mount kit for Di2 junction box
Q-Rings feature up to 5 Optimum Chainring Positions (OCP) that can be oriented around a cyclist’s distinct pedalling characteristics
hence the development of a UD carbon flatback shape seatpost
7 speed or 8 speed rear derailleur system
Shimano Dura-Ace Disc Front Brake Caliper (BR-R9170-F) brompton Mount kit for Di2 junctionDURA ACE Hydraulic Disc Brake Front Caliper BR R9170 F The DURA ACE R9100 series of Flat Mount disc brakes bring powerfully integrated brake performance to the highest rungs of road cycling. The R9170 calipers are light weight while offering better control and confidence in race conditions. FEATURES Better control and confidence in race conditions Optimally balanced hydraulic brake system for racing Light weight Improved heat dissipation ICE
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