Shimano Ultegra Di2 R8170 12S Groupset

With this Ultegra, Shimano offers the perfect groupset for the dedicated amateur rider. It comes with modern Di2 technology and a 12-speed drivetrain and probably offers the best price-performance ratio in the road bike sector. The high level of functionality and quality reflects the Japanese company's many years of experience. Now with the new Ultegra brake rotor, you can get the complete groupset here at R2-BIKE.COM at a unique special price and in a beautiful box.

Technically, the Ultegra Di2 is similar to its big sister Dura-Ace. The shifting commands are transmitted wirelessly to the front derailleur and rear derailleur. The latter are connected to a central battery, which can be concealed in the seat post, for example. The 12-speed drivetrain has also been adopted and enables a wider gear range. This makes long uphill rides very comfortable even for less trained riders.

Shifter/brake lever SHIMANO Ultegra Di2 ST-R8170 2x12-speed + disc brake BR-R8170 Flat Mount - The dual-control shift/brake levers keep you in control of your bike at all times. The raised croissants offer various grip options so that your hands and arms can change their position regularly and avoid fatigue. Shifting is done at the touch of a button. This is quick and effortless. The pressure point is so precise that unintentional gear changes are practically impossible. This wireless system is also fully customizable with the help of the Shimano E-Tube app. Among other things, the shifting speed can be set, a fully or semi-synchronous shifting mode can be selected, and the program buttons on the lever can be assigned specific functions. Energy consumption is also very low. According to Shimano, the two CR1632 button cells should supply the electronics with power for over 3 years. The absence of wiring not only simplifies installation, but also gives you a neat and tidy cockpit.

When braking, SERVO WAVE technology gives you optimum control over your bike at all times. This offers unparalleled modulation and sufficient power. But it's not just the inner values that are impressive. The ergonomics have also been significantly improved. The grip recess is better shaped, and the rounded brake levers lie securely under your fingers even on long descents. The grip width is also individually adjustable.

The completely redesigned Ultegra BR-R8170 brake calliper enriches the world of road bikes with a new level of control and unprecedented braking power. The new design minimizes brake rubbing. In addition, despite its compact size, this system is quieter and easier to maintain than ever before, so that tasks such as bleeding, for example, pose no major problems for a reasonably handy biker.

Brake rotor SHIMANO Ultegra Center Lock RT-CL800 - When developing the Ultegra CL800 brake rotors, Shimano engineers succeeded in preventing heat-related deformation of the rotors. As a result, the CL800 rotors offer more reliable, more controllable braking performance and are quieter than ever before. Fortunately, the weight has remained at the same low level as the previous version.

Also on board is Shimano's Ice-Tech cooling technology, which ensures excellent heat dissipation and constant braking performance even on long, steep descents. The brake discs feature a three-layer sandwich construction with stainless steel sides and an aluminium core for significantly improved heat dissipation. This reduces the temperature by around 100 °C. In addition, the FREEZA aluminum cooling fins reduce the system temperature by around a further 50 °C thanks to their increased surface area. The increased heat dissipation means that smaller brake discs can be fitted than usual. The service life of the brake pad is also significantly extended.
As is typical for Shimano, the rotors are suitable for Center-Lock mounts, which enable quick and easy installation, provide a secure hold and ensure a clean and compact look.

Crank SHIMANO Ultegra FC-R8100 50-34/52-36 teeth | 2x12-speed - The Ultegra crank not only converts your pedal power into propulsion, but its high rigidity also ensures extremely fast and precise shifting. This is supported by the optimized tooth design of the chainrings. The latter also increase aerodynamics thanks to their integrated design. To keep weight as low as possible, the Japanese continue to rely on the proven Hollowtech II crank arm design.

Front derailleur SHIMANO Ultegra Di2 FD-R8150 | 2x12-speed - The advantage of electronic shifting systems is particularly noticeable in the front derailleur. At the touch of a button, the chain moves from one chainring to the other as if by magic, without any effort at all. It also thinks for itself and automatically adjusts its position to the chain skew to avoid grinding noises. With the help of the Shimano E-Tube app, the front derailleur is adjusted after installation, and a manual, fully or semi-synchronous shifting mode is selected depending on preference.

Rear derailleur SHIMANO Ultegra Di2 RD-R8150 | 2x12-speed - Shifting gears has never been so fast. One push of a button and the chain shifts from one sprocket to the other in a fraction of a second, regardless of the situation. This is carried out by the powerful and reliable integrated motor. The system is also supplied with new energy via the rear derailleur. The charging cable is plugged into the small charging port and after approx. 1.5 hours, you can get back in the saddle. A small LED reliably indicates the remaining capacity. With the help of the Shimano E-Tube app, the rear derailleur is fine-tuned after installation, and a manual, fully or semi-synchronous shifting mode is selected depending on preference. The narrow Shadow profile reduces the risk of damage in the event of a fall.

Cassette SHIMANO Ultegra cassette CS-R8100 | 12-speed  50-34/52-36 teeth - 
The Shimano Hyperglide cassettes have set new standards in off-road use with their smooth upshifting and downshifting across the entire gear range. For the Ultegra groupset, the Japanese have also adopted this technology for road bike use. You can now shift gears without hesitation, even when exerting maximum effort on climbs or sprinting to the finish line. Among other things, longer teeth make this possible. Despite the new design and the additional 12th sprocket, the CS-R8100 cassettes are also compatible with previous 11-speed Shimano Road freehub bodies.

SHIMANO Ultegra CN-M8100 / Deore XT 12-speed chain | 116 links with chain lock - 
The CN-M8100 chain is specially designed for the 8100 chainrings and cassettes. Thanks to cut-outs on the inside of the plates, it harmonizes perfectly with the Dynamic Chain Engagement+ (DCE+) Narrow-Wide tooth profiles of the new Ultegra chainrings. The design results in a tighter fit of the chain on the teeth. Vibrations are avoided, and the smoother chain run is not only noticeable when pedaling, but also manifests itself acoustically through a quieter drivetrain. Thanks to a new chrome-plated surface in combination with the proven SIL-TEC coating, the service life of the chain has been kept at the same level as the M8000 chain, despite the smaller outer width.

BT-DN300 internal battery - Integrated battery of the latest generation, which is recessed in the seat post or steerer tube. The internally routed cables give the road bike a tidy appearance. The integration of the battery into the frame also reduces the number of attachments that stand in the wind. The battery can remain in the bike for charging.

E-Tube cable SHIMANO for Di2 | EW-SD300-I internal - These cables connect all electrical components of the Shimano E-Tube system. They are used in the current Dura Ace Di2 9200 and Ultegra 8100 groupsets, among others. The more compact design enables the use of smaller, lighter electronic components and makes internal cable routing much easier.

SHIMANO EW-EC300 charging cable - With this charging cable, you can charge the battery of your Shimano 12-speed drivetrain via the charging port on the rear derailleur.

• Material: Aluminum, plastic
• Drivetrain: 2x12 speed
• Brake Type: Hydraulic disc brake
• Brake Mounting: Flat mount (optional rear adapter may be required depending on frame)
• Crank Spindle Diameter: 24 mm
• Crank Arm Length: 165, 172.5 mm
• Chainring Combination: 50-34T
• Chainring BCD: 110 mm, 4-arm (Shimano asymmetrical)
• Cassette Range: 11-34T
• Freehub Compatibility: Shimano 11/12-speed Road
• Front Derailleur Mount: Braze-on (clamp available separately)
• Battery Life: Approx. 2,000 km

• 1x SHIMANO shift | brake lever Ultegra Di2 ST-R8170 2x12-speed + disc brake BR-R8170 Flat Mount front
  
• 1x SHIMANO shift | brake lever Ultegra Di2 ST-R8170 2x12-speed + disc brake BR-R8170 Flat Mount rear, WITHOUT 160 mm adapter
  
• 2x SHIMANO brake rotor Ultegra Center Lock RT-CL800 | 160 mm
  
• 1x SHIMANO crank Ultegra FC-R8100 | 2x12-speed 
  
• 1x SHIMANO front derailleur Ultegra Di2 FD-R8150 | 2x12-speed
  
• 1x SHIMANO rear derailleur Ultegra Di2 RD-R8150 | 2x12-speed
  
• 1x SHIMANO cassette Ultegra CS-R8100 | 12-speed 11-34 teeth
  
• 1x SHIMANO chain Deore XT | Ultegra CN-M8100 12-speed | 126 links with chain lock
  
• 1x SHIMANO BT-DN300 internal battery
  
• 1x SHIMANO E-Tube cable for Di2 EW-SD300-I | 600 mm
  
• 1x SHIMANO E-Tube cable for Di2 EW-SD300-I | 1200 mm
  
• 1x SHIMANO charging cable EW-EC300
• Without Bottom Bracket