RD-R8150 Di2 12-Speed Rear Derailleur E-tube

High spec wireless road bike mech, part of Shimano's much revered Di2 shifting system.

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

Shimano Di2 (Digital Integrated Intelligence) provides unmatched drivetrain efficiency thanks to it's pre-programmed automatic motion. Shimano Di2 is a compatible with the E-Tube hybrid system, with wireless cockpit and wired connection between seat-tube stored battery and derailleurs.

Recommended for use with CNM8100126Q - M8100 chain

Genuine, brand new, boxed Shimano product - Biketart are an official UK Shimano stockist.

• Button on the derailleur for Di2 operations, and LED light denotes synchronized shift mode, setting mode and charge requirements
• Sleek appearance with Low profile Shadow design construction reduces risk of damage in a crash
• Programmed automatic motion at the touch of a switch makes this derailleur quick, smooth and effortless to shift
• The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching, but provides effortless gear shifts
• Derailleur contains a saver (fuse) function, where the inner structure is protected from strong impacts
• 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