All replacement derailleur hangers are produced to exacting tolerances.

CNC machined 6061 aluminum
Black anodized finish
Mounting hardware included

Improves chain wrap and reduces premature shifting degradation
Fastest route to improved wear and long-term shifting performance on wide-range one-by-ten drivetrains.
Compatible with any 11-40t or 11-42t ten-speed cassette.
Compatible with 2013 or late