Stiffer and lighter original hangers, Ridea rear derailleur hangers for Birdy give you the option to run Shimano direct mount derailleurs without the bracket axle unit, providing a better shifting action.
| P/N | RD compatibility | Frame compatibility | Material | Weight | Colors* |
| PHKBD1 | Shimano direct mount | Mark 2 frames (2006 to 2015) | CNC alloy | 13 g | black, red, gold, silver |
| PHKBD2 | Shimano direct mount | Mark 3 frames (2015 to present) | CNC alloy | 14 g | black, red, gold, silver |
| PHKBD3 | Shimano standard mount | Mark 3 frames (2015 to present) | CNC alloy | 14 g | black, red, gold, silver |
*More colors are available as a customization option.