Shimano Ultegra Di2 FD-R8150 front derailleur

The new Di2 platform for 12-speed components requires no cable connection to the rear derailleurs and front derailleurs. The Di2 Dual Control shift levers ST-R8170 and ST-R8150 have the necessary wireless module integrated. Power is supplied by CR1632 batteries. These 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. The brand-new Di2 platform is used on Dura-Ace and Ultegra, where it delivers the world’s fastest and most reliable wireless shifting.

Shimano Ultegra FD R8150 Di2 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 Ultegra Di2 front derailleur operates even faster and with greater precision. More compact and faster than ever before, the Ultegra R8150 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 Ultegra R8150 front derailleur shifts between chainrings as quickly and seamlessly as no other model on the market.

Synchro-Shift technology

Synchro-Shift technology simplifies shifting immensely and significantly reduces the number of decisions riders have to make whilst riding. Particularly in crucial race situations or when riding at the limit, riders often have to juggle a multitude of decisions alongside the physical strain, which can lead to errors. 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-larger or next-smaller 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 responds to the shifting operations performed by the rider on the rear derailleur. Essentially, this means that only a single shifter with two levers is required 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 Ultegra DI2 FD R8150 Front Derailleur Technical Specifications:

• for 2x12-speed cranksets
• Solder-on mount
• Capacity: 16 teeth
• Largest chainring to be shifted: 50–54 teeth
• For 44.5 mm chainline
• For chainstay angles of 61–66 degrees
• Compatible only with Shimano Dura-Ace and Ultegra Di2 12x2-speed shifters
• Weight: 110 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