Shadow Rear Derailleur (12 speed)
The RD-R8150 rear derailleur is part of Shimano's new 12 speed system, allowing for both wired and wireless communication between the derailleur and shift levers.
It is used with the newer battery, the BT-DN300.
This derailleur features a charge port, LED, button and an EW-SD300 type port used to connect the derailleur to the battery. Both the rear derailleur and the front derailleur connect to the battery using a wire. The shift levers send their shift commands to the rear derailleur wirelessly.
Note that you can also connect these using wires. In fact, for rim brake users this is the only option.
The low sprocket maximum is 34T and I expect a lot of bikes to be built up with 11-34T cassettes.
Details & Specifications
|Shimano model number:||RD-R8150|
|E-Tube Port type:||SD300|
|Component series:||Ultegra R8100 (Road)|
|Downloads:||RD-R9250 / RD-R8150 User Manual|