Shimano Ultegra Di2 R8150 12 Speed Rear Derailleur

Now 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.

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.

Ultegra Shadow design with Di2 technology, shifting is easy and precise – just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear

The rear derailleur is now the brains of the system with wireless connectivity to the shifters. It acts as the point the system is charged, provides ANT+ connection to 3rd party devises and replaces the handlebar junction

Button on the derailleur for Di2 operations, and LED light denotes synchronized shift mode, setting mode and charge requirements.

Programmed automatic motion at the touch of a switch makes this derailleur quick, smooth and effortless to shift.

High tolerance cold forged aluminium link plates and body construction is extremely light and durable. Four self-lubricating micro-machined fluorine-coated link pivot bushings provide low-friction shifting.

12-speed E-tube Di2 compatible

Wide gear ratio compatible up to 11-34T

• 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 - Pairing - Adjust mode, etc.
• Wider range capacity - Max. low sprocket: 34T
• Weight: 262g