Shimano's RD-R9150 Dura-Ace Di2 Rear Derailleur uses a low-profile Shadow design that keeps it more closely tucked beneath the cassette for more stable shifting and reduced likelihood of being damaged in a crash.
Please provide a one sentence summary of your thoughts. This will be used as the review headline.
Please tell us how you use the product and what you like and don't like about it. Specific examples can make your review more helpful to others.
Enter a user name to list with your review. We will use Anonymous if no user name is provided.
Your location can help others get a better feel for the cycling terrain and weather conditions you deal with.
Tell us what kind of cyclist you are. This will help other readers interpret your review.
We occasionally would like to contact our customers regarding their review. Please provide your email address if you don't mind us contacting you. Your email address will not be used for any other purpose.
