Shimano Ultegra Di2 RD-R8150 Bracket Axle Unit - Normal Type - Y3J198020

Bracket Axle Unit for the Shimano Ultegra Di2 RD-R8150 12 speed rear derailleur.

Shimano state that this part is also an "A" match with these rear derailleurs. This means that the parts are the same in materials, appearance, finish & size etc.

Road / Gravel
- Shimano GRX Di2 RD-RX825

If not available then the following are a "B" match which means that the parts are usable, but differ in materials, appearance, finish & size etc.

- Shimano GRX RD-RX820
- Shimano GRX Di2 RD-RX815

Genuine Shimano replacement part.

Note: Scrolling down the page will take you to the associated parts related to this rear derailleur & their availability