Shimano Ultegra 12-speed Di2 R8150 gear upgrade kit

The upgrade kit for the Shimano Ultegra R8150 Di2 gear components. The Shimano Ultegra Di2 R8150 series for classic rim brakes, the affordable version of Shimano’s electronic road bike components.

The Di2 12-speed rear derailleur, with the 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. Furthermore, the rear derailleur features a charging socket and a connection for diagnostic tools.

Contents of the Shimano Ultegra R8170 Di2 groupset:

• Shimano Ultegra Di2 rear derailleur, RD R8150
• Shimano Ultegra Di2 front derailleur FD R8150 available as a brazed-on front derailleur
• Optional derailleur clamp for 31.6 or 34.9 mm
• Shimano Ultegra Di2 STI, Dual Control shift lever, 11/2-speed, ST R8150
• Shimano Di2 cable set, EW-SD300: 5 cables
• Shimano Di2 Junction Port B EW-JC304, 4 ports
• Shimano Di2 battery, BT-DN300 internal round
• Shimano Ultegra brakes BRR8100 or BRR8110
• Shimano brake cables, outer casing and inner cables
• optional optional Shimano Ultegra cassette, CS R8100 in 2 gear ranges
• optional Shimano chain, CN M8100
• optional charger

Shimano Ultegra RD-R8150 Di2 rear derailleur

The new Ultegra rear derailleur is the centrepiece of the new 12-speed Di2 components. It provides the wireless functionality and connection to external components, and also houses the charging port. The rear derailleur also houses the transmitter for wireless communication with the STI shifters and other external devices, including third-party ones. Furthermore, it features the status LED and the adjustment button, which is used, for example, to switch between Synchro-Shift modes, meaning that the previous Junction A port, SM-RS910, is no longer required.

Precise, lightning-fast shifting 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 link 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 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.

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 handlebar 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 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 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 the Junction Port B on the junction box.

Unlike the disc brake version, the Ultegra STI shifters 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 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 racing. 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 pivot points of the brake. This increases stiffness and thus braking performance. Please check your frame specifications. For direct-mount 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 sprockets are worn out, 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 bike 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 outstanding shifting performance when shifting up or down.

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