The Shimano Dura-Ace RD-R9150 Di2 Rear Derailleur sees a ground-up re-design which takes advantage of Shimano's Shadow RD architecture first introduced for mountain bikes. This low profile design delivers a sleek appearance while improving ability to withstand crash damage. Combined with Shimano's Synchro Shift customizable programming, Dura-Ace Di2 delivers a level of intuitive shift performance never before seen.
For double gearing configurations, 11-speed
Weight: 204 grams
Minimum Sprocket: 11 tooth
Maximum Sprocket: 30 tooth