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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