Specialized Rear Derailleur Hanger

This hanger, model DH-033, is designed specifically for a range of Specialized models including the Allez, Diverge, Sirrus, and Vita. Before purchasing, verify your bike's specific model and year, as Specialized produces different hanger shapes for different frame designs.

A bent hanger misaligns your derailleur, which causes poor shifting, skipping gears, or the chain dropping off the cassette. Replacing it restores precise alignment and prevents the derailleur from potentially catching in your spokes.

Yes, this replacement hanger includes the required mounting bolt. You will only need basic tools, typically a hex key, to remove the old hanger and secure the new one.

While some shops use a derailleur hanger alignment gauge to straighten minor bends, the metal is often weakened during the process. Replacing the hanger is the safest and most reliable way to ensure long-term shifting performance and frame integrity.

The hanger is engineered to be the weakest point in the drivetrain assembly. If your bike falls or the derailleur takes an impact, the hanger is designed to bend or break first, absorbing the force to protect your frame's dropout from permanent, costly damage.