The Specialized Road Thru Axle Derailleur Hanger is an OEM replacement part for a number of Specialized and S-Works road, gravel, and cyclocross bikes. To choose the correct derailleur hanger for your bike, it is important that the hanger is identical in appearance to the one it is replacing. Carefully compare images with the actual hanger to ensure that the shape is the same and that the bolt holes are in the same locations. Not the exact hanger you're looking for? Check out our selection of Specialized Rear Derailleur Hangers. OEM Part for the following Specialized Bikes: Specialized Crux Specialized Diverge Specialized Roubaix Specialized Ruby Specialized Venge Specifications: Material: Aluminum Compatibility: Carbon/Alloy frames