Shimano Ultegra 12-speed Di2 R8150 road bike groupset

The Shimano Ultegra 12x2-speed groupset for rim brakes with the Ultegra power meter. The Di2 shift-brake levers for rim brakes are not wireless.

The Ultegra Di2 12-speed rear derailleur, with the additional wireless unit, is connected via cable to the battery, shift levers and front derailleur for power supply and shift signal transmission. Additional wireless components, including those from third-party manufacturers, can also be paired with the rear derailleur. Furthermore, the rear derailleur features a charging socket and a connection for diagnostic tools.

Contents of the Shimano Ultegra R8170 Di2 drivetrain and groupset:

• Shimano Ultegra Di2 rear derailleur, RD-R8150
• Shimano Ultegra Di2 front derailleur, FD-R8150
• Optional Shimano front derailleur clamp, 34.9 mm or 31.8/28.6 mm
• Shimano Ultegra Di2 STI, Dual Control shift lever, 12x2-speed, ST-R8170
• Shimano Di2 cable set, 5 cables, EW-SD300:
• Shimano Di2 Junction Box B, EW-JC304
• Shimano Di2 battery, internal round, BT-DN300
• Shimano brake cables, outer casing and inner cables
• Shimano Ultegra power meter crankset, 165–175 mm length, 52/36 or 50/34 teeth, FC-R8100-P
• Shimano Ultegra cassette, in 2 sizes, CS-R8100
• Shimano chain, CNM8100
• Optional charging cable, EW-EC300
• Optional Shimano Ultegra brakes BRR8100 or BR-R8110
• Optional Shimano Ultegra bottom bracket, SMBBR60 BSA or Italian thread or Pressfit BB86, or Wheels MFG bottom bracket for BB86, T47, BB30, Pressfit30, BBright or BB386 bottom bracket shell

Shimano Ultegra RD-R8150 Di2 rear derailleur

The new Ultegra rear derailleur is the centrepiece of the new 12-speed Di2 groupset. It provides the wireless functionality and connection to external components, and also houses the charging port. Furthermore, the rear derailleur contains the transmitter for wireless communication with the STI shifters and other external devices, including those from third-party manufacturers. It also features the status LED and the adjustment knob, which is used, for example, to switch between Synchro-Shift modes.

Precise, lightning-fast gear changes at the touch of a button, in any situation. The Shimano Ultegra Di2 RD R8150 rear derailleur is even more compact and lighter than its predecessor and features E-Tube connectors for extremely easy installation. Equipped with a crash mechanism that disconnects the connection to the motor in the event of strong external forces to prevent damage.

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 more precisely. 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.

Shimano Ultegra Di2 Shift/Brake Levers ST-R8150

The Di2 shift/brake levers with a new ergonomic shape. These STI levers do not have a wireless function and require cabling. The space between the brake lever and the handlebars has been slightly increased to provide the optimal balance of comfort and control. Road cyclists will now be able to grip the new levers more securely and comfortably with their thumb and index finger, whilst the remaining three fingers can be positioned comfortably between the handlebars and the brake lever. However, thanks to adjustments and enlargements to the design of the shift buttons, these remain easy to reach from the lower handlebar position. Furthermore, the two shift buttons on each STI lever are now positioned at a greater height difference from one another, enabling more intuitive operation, particularly with wet, cold fingers or full-finger gloves. In addition, the shift-brake levers feature classic cable connections for mounting additional shift levers.

Synchro-Shift technology

Synchro-Shift technology simplifies shifting immensely and significantly reduces the number of decision-making processes that take place whilst riding. Particularly in crucial race situations or when riding at the limit, 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 shifts the rider makes on the rear derailleur. Essentially, this means that only one shifter with two levers 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 shifting.

Shimano Di2 installation:

Installing Shimano Di2 components is almost easier than fitting traditional gear systems. The standardised cable connectors and the junction box ensure straightforward and quick installation. The shift levers are connected to Junction Port B on the junction box.

Unlike the disc brake version, the Ultegra STI shift levers for rim brakes are not wireless and require Junction Port B for cabling. This provides 4 connectors to link the EW SD300 cables to the battery. A total of 5 cables are required: 2 cables of approx. 60 cm from the STI to the Junction Port and 1 cable of approx. 140 cm from the Junction Port to the battery. Due to its small size, the Junction Port can be easily stowed in the down tube of the frame without any additional mounting aids. In addition, a power supply cable of 120 cm for the rear derailleur and 60 cm for the front derailleur is required.

Shimano Ultegra FC-R8100 crankset:

Hollow-forged chainrings, thin-walled hollow-forged crank arms and a reduced outer surface area reduce the weight of the new Ultegra 12-speed FCR 8100 crankset. The design of the 2x11-speed Hollowtech II crankset ensures enhanced performance. As a key component in Shimano’s new 12-speed Ultegra series, the FC-R8100 crankset is characterised by Shimano’s signature shifting quality and transmission efficiency. Revised for seamless 12-speed shifting, the Ultegra crankset is available in lengths from 160 to 175 mm. This means greater performance and improved customisation options for smaller riders, triathletes and riders with specific biomechanical requirements.

Optional bottom brackets:

We offer optional bottom brackets from Shimano, Wheels Manufacturing and FSA for the Shimano Ultegra R8150 Di2 groupset. This allows the crankset to be fitted to all standard bottom bracket shells.

Shimano BR R8100 or BR-R8110 rim brakes:

The elegantly designed rim brake of the R8100 series, with its lightweight dual-pivot caliper, offers maximum precision for better control and greater reliability in races. Thanks to the additional reinforcement booster, the Ultegra BR-R8100 brakes offer unprecedented torsional stiffness. The rim brake is easy to adjust and maintain thanks to easy access for tools and the ability to change wheels quickly.

With direct-mount brakes, the brake is mounted to the frame or fork using two bolts. These bolts are positioned directly at the brake’s pivot points. This increases stiffness and thus braking performance. Please check your frame specifications. For direct mounting of the brakes, the frame or fork requires two threaded holes each for mounting the brakes.

Shimano CS-R8100 Di2 12-speed cassette:

The Shimano Ultegra CSR8100 cassette, featuring two large sprocket blocks on an aluminium spider, offers Shimano’s outstanding smooth shifting performance combined with low weight and long-lasting durability. Shimano offers replacement sprockets for these cassettes. This means that if only a few are worn, they can be replaced cost-effectively.

The 12-speed cassettes are compatible with both the new HG12 and the previous HG11 freehub bodies. The new 12-speed freehub bodies feature finer teeth. This allows for a significantly better connection between the cassette and the freehub body.

Shimano CN-M8100 chain:

The Shimano chain for 12-speed road and MTB drivetrains. The special asymmetrical outer and inner links, combined with Shimano’s SIL-TEC surface coating, minimise friction, optimise performance and also reduce dirt build-up.

The chain is perfectly matched to the 12-speed Shimano chainrings with Dynamic Chain Engagement+ (DCE+) tooth profiles. The HG Plus chain has been completely redesigned and features even finer, precision-machined contact surfaces with the sprockets and chainrings, particularly on the inner links. Furthermore, the inner links are chrome-plated, making them even more durable whilst delivering excellent shifting performance when shifting up or down.

Compatible bottom bracket shells – bottom brackets

There is now a wide variety of bottom bracket shells on modern frames. Shimano only offers compatible bottom brackets for some of these. To ensure the Ultegra groupset fits all frames, we supply optional FSA or Wheels MFG bottom brackets for the bottom bracket shells for which Shimano does not offer bottom brackets. Wheels Outboard bottom brackets are significantly more durable than standard press-fit bearings, as the cup halves are bolted together, ensuring they sit flat and securely within the frame. Wheels bearings are available in various quality grades: ABEC3 standard bearings, angular contact bearings and ceramic bearings.

• BSA threaded housing, 68 mm installation width
  Shimano SM-BBR60B bottom bracket
• BSA threaded housing, 70 mm installation width
  Shimano SM-BBR60I bottom bracket
• Pressfit BB86 housing, installation width 86.5 mm, press-fit diameter 41 mm, Shimano
  SM-BB71-41B bottom bracket or Wheels MFG Outboard
  BB86-OUT-BB bottom bracket
• BB30 shell, installation width 68 mm, press-fit depth 42 mm, Wheels MFG
  Outboard BB30-OUT bottom bracket
• BB30A shell, installation width 73 mm (asymmetrical), press-fit depth 42 mm, Wheels MFG Outboard
  BB30A-OUT-SHIM bottom bracket
• Pressfit 30 shell, installation width 68 mm, press fit 46 mm Wheels MFG Outboard
  PF30-OUT bottom bracket
• Pressfit 30A shell, installation width 68 mm asymmetrical, press-fit dimension 46 mm, Wheels MFG Outboard
  PF30A-OUT-SHIM bottom bracket
• BBRight housing, installation width 79 mm, press-fit dimension 46 mm Wheels MFG Outboard
  BBRIGHT-OUT bottom bracket
• BB386 shell, installation width 86.5 mm, press-fit dimension 46 mm, Wheels MFG Outboard
  386EVOBB-SHIMBB bottom bracket
• Trek BB90 shell, installation width 90 mm, press-fit dimension 41 mm FSA
  230-600 bottom bracket
• T47 threaded shell, installation width
  68–73 mm Wheels MFG Outboard T47-OUT-SHIM
• T47 threaded shell, installation width 86–89.5 mm
  Wheels MFG Inboard T47-BB-SHIM
• T47 threaded shell, installation width 77.79 mm asymmetrical Wheels MFG
  BB-T47A-24MM bottom bracket

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