
Shimano Ultegra R8150 Di2 12 Speed Rear Derailleur
The Ultegra R8150 12 speed Di2 technology delivers 58% faster rear shifting than RD-9150. Shimano’s wireless Di2 processing technology, increases transmission speed and performance, offering reliable, fast shifts every single time. Now the rear derailleur integrates the system charging port and a wireless connectivity unit together and simplified with a single derailleur cage length, the new 12-speed Shimano Ultegra R8150 rear derailleur packs Shimano's fastest, most precise shifting into a more approachable option that is compatible with cassettes from 11-28T to 11-34T.
- Model: RD-R8150
- Series: Ultegra R8100
- Rear speed: 12
- Average weight: 262g
- Remarks: w/o Bracket spec available
- Firmware update by E-Tube project: ✔
- Total capacity: 39T
- Charging port (pcs): 1
- B-axle (Hollow axle): ✔
- B-axle 2 (Hollow axle): ✔
- Direct attachment (Conventional): ✔
- Direct Mount: ✔
- Fluoric coated link bushings: 4
- Low sprocket (Max): 34T
- Low sprocket (Min): 30T
- Top sprocket (Max): 14T
- Top sprocket (Min): 11T
- Front difference (Max): 16T
- Guide pulley bearing: ✔
- Pulley Teeth: 11
- Top-normal spring type (Shimano Shadow RD): ✔
- Charging cable: EW-EC300
- LED for system status: ✔ (battery, pairing, adjust mode, synchro shift)
- SD300 port (pcs): 1
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