Shimano 105 Di2 RD-R7150 2×12 Rear Derailleur

The Shimano 105 Di2 RD-R7150 is an electronic rear derailleur designed for 2×12-speed road bike drivetrains. It delivers fast, precise and consistent gear changes, bringing Shimano’s proven Di2 technology to the popular 105 R7100 series.

A high-performance motor and optimized linkage design enable almost instantaneous shifting at the press of a button. Electronic control eliminates the need for a traditional shift cable and helps maintain consistent performance throughout long rides and in changing conditions.

The control centre of the Di2 system

The RD-R7150 acts as the communication hub of the drivetrain. It receives wireless commands from compatible shift/brake levers while connecting to the central battery and front derailleur through E-Tube wires.

Its compact housing integrates:

• a wireless communication unit,
• a system charging port,
• an operating and adjustment button,
• an LED battery-status indicator,
• pairing and adjustment functions.

Drivetrain settings can be customized using the Shimano E-Tube Project Cyclist app. Depending on the configuration, it allows the rider to assign button functions, select shifting modes, fine-tune the derailleurs and update component firmware.

Wide gearing range

The derailleur is compatible with 12-speed road cassettes featuring a largest sprocket of 34T or 36T. This makes it suitable for fast riding on flat roads as well as demanding climbs.

Its low-profile Shadow RD design positions the mechanism closer to the bicycle. This reduces how far it protrudes beyond the frame, limits its exposure to damage from impacts or falls, and contributes to stable and quiet drivetrain operation.

Key features

• Shimano Di2 electronic rear derailleur
• Designed for road bikes
• Compatible with 2×12-speed drivetrains
• Shimano 105 R7100 series
• Compatible with 12-speed cassettes
• Smallest cassette sprocket: 11T
• Largest cassette sprocket: up to 36T
• Total capacity: 41T
• SGS cage
• Fast and precise electronic shifting
• Wireless communication with compatible shift/brake levers
• Integrated charging port and LED indicator
• Configuration through the E-Tube app
• Low-profile Shadow RD construction
• Colour: black and grey
• Supplied in production packaging

The Shimano 105 Di2 RD-R7150 is an excellent choice for road cyclists looking for the convenience of electronic shifting, a wide gearing range and the reliable precision associated with Shimano’s higher-level component groups.