Shimano Ultegra R8100 Di2 Disc Groupset

The Shimano Ultegra 8100 DI2 groupset is a semi-wireless electronic gear shifting groupset with disc brakes. This groupset gives you one of the best braking and shifting performances available. Besides that, it gives you more confidence and security in the long run.

This is because there are many similarities with the Dura Ace 9200 DI2 Disc groupset. Shimano has saved a bit on the materials used for the components of this groupset. However, it has the same improvements in terms of shifting speed on the derailleurs as the Shimano Ultegra R8050 groupset.

In principle, the electronic set-up only needs to be adjusted once for the rest of the bike's life. Maintenance of the braking system is also simplified and it is less susceptible to brake disc rubbing or annoying noises while in use.

Technology

Semi-wireless
This Shimano Ultegra R8100 DI2 Disc group only has a cable connection between the battery, front and rear derailleur. The shifting performance has been lifted to an even higher level. Not only has the shifting speed been increased, you can now also shift smoothly while you're applying force to the pedals. Also, there is no longer a need for a junction box, but you can set up the groupset and charge it via the rear derailleur. When the groupset is fully charged, you can ride about 1000 kilometres. The wireless shifters contain two button cell batteries that last about 1.5 years before they need to be replaced. The charger is not included with the groupset and is the same as the one used for the power meters.

Shimano DI2 app
All adjustments such as assigning shift buttons, shifting direction or adjusting the shifting speed can be done through the Shimano DI2 app. The function of each shift button is individually adjustable. It is still possible to use the synchronized shift or semi-synchronized shift function with which the frond derailleur shifts along for the ideal chainline.

Servowave
The brakes use Shimano's Servo Wave Action. This technology ensures that the speed at which the pistons move towards the disc decreases as the pistons get closer to the disc. This maintains the torque that Shimano brakes are known for, but greatly improves the brake modulation.

Cassettes
Hyperglide+ cassettes are available in different ratios. These ratios take into account the sweet spot between the 6th, 7th and 8th sprockets. 12 speed makes it possible to maintain the sprockets that ride best at average speeds despite large ratio differences. The cassettes come with the well-known HG mounting pattern, which is also backwards compatible with all Shimano HG 11-speed bodies.

Brake maintenance
Maintenance of the brakes has been simplified. It is now possible to bleed the brake without removing the caliper from the frame, thanks to a separate bleeding port and twist valve. The new funnel and spacer for bleeding the caliper help optimise the bleeding process.

Delivery includes

• Shimano Ultegra R8170 Front disc brake set
• Shimano Ultegra R8170 Rear disc brake set
• Shimano Ultegra R8100 Front derailleur
• Shimano Ultegra R8100 Rear derailleur
• Crankset Ultegra R8100
• Cassette Ultegra CS-R8100 11-30T 12 speed
• Shimano Ultegra R8100 12 speed Chain
• Shimano RT-CL800 160/160mm Center Lock disc brake
• Shimano RT-MT-800 160mm Center Lock disc brake
• Electrical Cable 600 mm Black
• Electrical Cable 1200 mm Black
• Charging cable 1700 mm
• Internal Battery