Alloy Rear Derailleur Dropout Mech Hanger RMM238
Replaceable alloy rear derailleur mech hanger will fit various Diamondback/Raleigh bikes, plus lots of other makes.
These hangers are specifically designed to break to prevent damage to your frame.
This particular hanger is commonly referred to as an "RMM238" hanger.
Unfortunately it is not always possible to stipulate which models these hangers will fit, as manufacturers tend to change frame designs frequently. The best way to match your hanger is to compare it with the one pictured.
Popular models this hanger is compatible with:
Diamondback Response (2002)
Diamondback Sorrento (2002-12)
Diamondback Wildwood (2007-11)