Shimano RD-R8150 Ultegra Di2 12 Speed Rear Derailleur

With Shimano's fastest, most accurate shifting, the new 12-speed ULTEGRA R8150 rear derailleur is more versatile than ever thanks to a single cage length option that is compatible with 28-34T low sprockets

Features:

• Shimano's fastest ever rear shifting, 58% faster than RD-R9150
• Compact design includes an integrated wireless unit, charger, and switch
• LED status indicator
• Battery indicator
• Wider range capacity

Specifications:

• Rear speeds: 12
• RD construction: SHIMANO SHADOW RD
• Mount: Direct attachment (conventional), Direct mount
• Max. front difference: 16T
• Total capacity: 39T
• Low sprocket: 30-34T
• Top sprocket: 11T
• Fluoric coated link bushings: 4
• Pulley:
• Guide/Tension pulley bearing
• Teeth: 11
• Sunken type pulley screw
• B-axle: Hollow axle
• B-axle 2: Hollow axle
• Di2 connectivity wired shifting: ✔
• Di2 connectivity wireless shifting: ✔
• Bluetooth® LE custom |Adjust mode information: ✔
• Bluetooth® LE custom |Di2 battery level: ✔
• Bluetooth® LE custom |Gear position: ✔
• Bluetooth® LE custom |SHIMANO E-BIKE SYSTEMS data items (*3): ✔
• Bluetooth® LE custom |Compatible with E-TUBE RIDE: ✔
• Bluetooth® LE custom |Compatible with E-TUBE PROJECT: ✔
• ANT private |Adjust mode information: ✔
• ANT private |Di2 battery level: ✔
• ANT private |Gear position: ✔
• ANT private |SHIMANO E-BIKE SYSTEMS data items (*3): ✔
• Firmware update by E-TUBE PROJECT: ✔
• SD50 port (pcs): 0
• SD300 port (pcs): 1
• SD50 connector (pcs): 0
• SD300 connector (pcs): 0
• LED for system status: ✔
• Charging cable: EW-EC300
• Average weight: 262g