Shimano 105 Di2 FD-R7150 front derailleur

Lighter, faster and more aerodynamic: the Ultegra 12-speed Di2 front derailleur. Designed for chainring sizes ranging from 50/34 to 54/40 teeth, the new 12-speed 105 Di2 front derailleur operates even faster and with greater precision. More compact and faster than ever before, the 105 R7150 front derailleur delivers shifts with digital precision in all conditions. By combining Shimano’s new Di2 platform with the road bike version of Hyperglide+, the 105 R7150 front derailleur shifts between chainrings as quickly and seamlessly as no other model on the market.

The new Shimano 105 utilises a hybrid system comprising a wireless connection between the cockpit components and a cable connection between the rear derailleur, front derailleur and the central battery – usually housed in the seat tube – ensuring maximum reliability in all conditions. And just like its big brothers DURA-ACE and ULTEGRA, the SHIMANO 105 also excels with extensive options for quickly and easily customising it to the rider’s wishes and preferences via the E-TUBE app.

Via E-TUBE PROJECT, the gear system can be individually configured by, for example, adjusting the shift speed, the number of shifts when the button is held down, or the Synchro-Shift and Semi-Synchro-Shift functionality.

Furthermore, the system can be paired with many third-party cycle computers, including Garmin and Wahoo. This allows these devices to display, for example, the current gear or the battery charge level.

The new Di2 platform for 12-speed components requires no cable connection to the rear derailleur and front derailleurs. The Di2 Dual Control shift levers ST-R7170 have the necessary wireless module integrated. Power is supplied by CR1632 batteries, which have a service life of up to 2 years. The Di2 12-speed rear derailleur, with its additional wireless unit, acts as a receiver and distributor of shift signals and is connected to the battery and front derailleur for power supply and shift command transmission. Additional wireless components, including those from third-party manufacturers, can also be paired with the rear derailleur.

Synchro-Shift technology

Synchro-Shift technology greatly simplifies shifting and significantly reduces the number of decision-making processes that take place whilst riding. Particularly in crucial race situations or when riding at full throttle, riders often have to navigate a multitude of decision-making processes alongside the physical strain, which are frequently disrupted and lead to wrong decisions. The fewer decisions there are to make, the better the decisions will be and the more attention can be focused on the race. This is precisely what Shimano Synchro-Shift technology enables, always selecting the optimal next-higher or next-lower gear combination, regardless of whether this requires shifting at the rear derailleur and/or the front derailleur.

Shimano Synchro-Shift functions

• Full Synchro-Shift: The front derailleur reacts to the gear changes the rider makes on the rear derailleur. Essentially, this means that only one shifter with two buttons is needed to operate both the rear and front derailleurs.
• Semi Synchro-Shift: The rear derailleur responds to the gear changes the rider makes on the front derailleur. The rear derailleur automatically performs the necessary compensatory shifts for small changes in cadence when shifting up or down on the front derailleur.

Shimano 12-speed Di2 installation:

Shift commands are transmitted wirelessly from the shift levers to the rear derailleur. Only the rear derailleur and front derailleur are connected to the battery via cables. This ensures a clean look and significantly reduces the installation effort. The shift levers are powered by CR1632 batteries. The shift levers feature an additional cable connection, which allows for the connection of auxiliary switches.

Synchro-Shift technology

Synchro-Shift technology simplifies shifting immensely and significantly reduces the number of decisions that need to be made whilst riding. Particularly in crucial race situations or when riding at full throttle, riders often have to make a multitude of decisions alongside the physical strain, which are frequently disrupted and lead to wrong decisions. The fewer decisions there are to make, the better the decisions will be and the more attention can be focused on the race. This is precisely what Shimano Synchro-Shift technology enables, always selecting the optimal next-higher or next-lower gear combination, regardless of whether this requires shifting at the rear derailleur and/or the front derailleur.

Shimano Synchro-Shift functions

• Full Synchro-Shift: The front derailleur reacts to the gear changes the rider makes on the rear derailleur. Essentially, this means that only one shifter with two buttons is needed to operate both the rear and front derailleurs.
• Semi Synchro-Shift: The rear derailleur responds to the gear changes the rider makes on the front derailleur. The rear derailleur automatically performs the necessary compensatory shifts for small changes in cadence when shifting up or down on the front derailleur.

Shimano 12-speed Di2 installation:

Shift commands are transmitted wirelessly from the shift levers to the rear derailleur. Only the rear derailleur and front derailleur are connected to the battery via cables. This ensures a clean look and significantly reduces the installation effort. The shift levers are powered by CR1632 batteries. The shift levers feature an additional cable connection, allowing for the connection of auxiliary switches. Traditional cabling from the shift levers to the battery is also possible. The new battery has three slots.

Shimano 105 DI2 FD R7150 Front Derailleur Technical Specifications:

• for 2x12-speed cranksets
• Solder-on mount
• Capacity: 16 teeth
• Largest chainring to be shifted: 50–54 teeth
• For chainline 44.5 mm
• For chainstay angles of 61–66 degrees
• Compatible only with Shimano Dura-Ace and Ultegra Di2 12x2-speed shifters
• Weight: 142 grams (manufacturer’s specification)

Herstellerinformation: SHIMANO INC., 3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan, www.shimano.com | EU contact: Shimano Europe BV, High Tech Campus 92, 5656 AG Eindhoven, The Netherlands, www.shimano.com