This replacement derailleur hanger 337 is CNC machined from 6061 aluminum in our Colorado shop to exacting tolerances. It features a black anodized finish, attaches with one custom M4x8 flat head screw (not included), and replaces Norco part #913015-003. Note: not the same as Derailleur Hanger 274, which uses an M3 flat head screw.
