It's always a great idea to have a spare derailleur hanger around in case of a mishap. The design of this hanger allows it to bend or break before serious damage occurs to your expensive bike frame. In the event of damage to the hanger, it's best to replace it rather than attempt to straighten it. This Ridley Derailleur Hanger fits Noah RS, Dean RS, and early '08 Helium frames. It's made of aluminum and is anodized Black. It comes with fresh hardware for installation.