Shimano Dura-Ace RD-R9100 Rear Derailleur

The DURA-ACE 9100 derailleur blends an aerodynamic SHADOW design with enhanced range options in a lightweight, attractive mechanism aimed at discerning road cyclists.[split]

Specifications
Stable shifting performance
Pulley follow-up in certain distance
SHIMANO SHADOW RD construction
Low profile rear derailleur design
Race endurance for less damage in crash
Adapted for race specific frame design

Mfr Claimed Weight
158g