Specialized MTN4 Derailleur Hanger

This hanger is specifically engineered for 2011-2015 Specialized Demo 8, SX Trail, and Trail models. Because derailleur hangers are frame-specific, you should visually compare your current hanger to the product photos to ensure the bolt pattern and shape match exactly before purchasing.

It is designed to be the weakest link in your drivetrain. By bending or breaking during an impact, the hanger absorbs the force that would otherwise damage your bike's frame, which is significantly more expensive and difficult to repair.

While some minor bends can be corrected with a derailleur alignment gauge, aluminum hangers often weaken or develop stress fractures once bent. Replacing a compromised hanger is the safest way to ensure crisp, reliable shifting and prevent future mechanical issues.

Yes, this is an original equipment component designed to meet Specialized's exact manufacturing standards. It ensures the precise fit and alignment required for your bike's rear shifting system to function as intended.

Installation typically requires only basic hex keys to remove the mounting bolts. However, once installed, you may need to adjust your rear derailleur's limit screws and cable tension to restore perfect shifting alignment.