Ultegra RX RD-R8150 Di2 12 Spd.

Now simplified with a single derailleur cage length, the new 12-speed Shimano ULTEGRA R8150 rear derailleur packs our fastest, most precise shifting into a more approachable option.

With our 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.

• Our fastest ever rear shifting, 58% faster than RD-R9150
• Compact design includes an integrated wireless unit, charger, and switch
• LED status indicator
• Battery indicator
• Pairing
• Adjust mode, etc.
• Wider range capacity
• Max. low sprocket: 34T

• MODEL NO	RD-R8150
  SERIES	ULTEGRA R8100 Series
  Color	Series color
  Average weight	262

  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	✔
  Mount_Direct mount compatible	✔
  Fluoric coated link bushings	4
  Low sprocket_Max.	34T
  Low sprocket_Min.	28T
  Max. front difference	16T
  Pulley_G pulley bearing	✔
  Pulley_Sunken type pulley bolt	✔
  Pulley_Teeth	11
  Pulley_T pulley bearing	✔
  Top-normal spring type_SHIMANO SHADOW RD	✔
  Top sprocket_Max.	14T
  Top sprocket_Min.	11T
  Rear speeds	12
  Di2 connectivity wired_Di2 shifting	✔
  Di2 connectivity wireless_ANT private (*2)_Adjust mode information	✔
  Di2 connectivity wireless_ANT private (*2)_Di2 battery level	✔
  Di2 connectivity wireless_ANT private (*2)_Gear position	✔
  Di2 connectivity wireless_ANT private (*2)_SHIMANO STEPS data items (*3)	✔
  Di2 connectivity wireless_Bluetooth® LE custom (*1)_Adjust mode information	✔
  Di2 connectivity wireless_Bluetooth® LE custom (*1)_Compatible with E-TUBE PROJECT	✔
  Di2 connectivity wireless_Bluetooth® LE custom (*1)_Compatible with E-TUBE RIDE	✔
  Di2 connectivity wireless_Bluetooth® LE custom (*1)_Di2 battery level	✔
  Di2 connectivity wireless_Bluetooth® LE custom (*1)_Gear position	✔
  Di2 connectivity wireless_Bluetooth® LE custom (*1)_SHIMANO STEPS data items (*3)	✔
  Di2 connectivity wireless_Di2 shifting	✔
  LED for system status	✔
  SD300 connector (pcs)	0
  SD300 port (pcs)	1
  SD50 connector (pcs)	0
  SD50 port (pcs)	0