Derailleur hanger

A derailleur hanger comprising:

• a first portion configured to be mounted to a hub axle, the first portion including a first part and a second part, the second part extending from the first part, the second part including an axle receiving bore configured to receive the hub axle;
• and
• a second portion coupled to the first portion, and configured to support a derailleur,
• the first part including a frame contact surface disposed in a reference plane extending perpendicular to a center axis of the hub axle in an installed state where the derailleur hanger is mounted to the hub axle,
• the second portion including a first surface disposed on a first side of the reference plane, the first side being opposite to a second side with respect to the reference plane, a vehicle center plane being positioned at the second side in the installed state,
• the second part being disposed on the first side in the installed state, the second part being disposed at least partially farther from the reference plane than the first surface.