Derailleur Hanger 57All Wheels Manufacturing replacement derailleur hangers are produced in our Colorado shop to exacting tolerances. CNC machined 6061 aluminum Black anodized finish Includes (3) M4x8 Flat Head Screws Attaches to frame with (3) M4x8 Flat Head Screws Note: DROPOUT 57 mounts on the OUTSIDE of the frame dropout. DROPOUT 89 is the same shape, but mounts to the INSIDE of the frame dropout.
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