Shimano Ultegra R8100 Di2 Disc Groupset

Shimano Ultegra R8100 Di2 Disc Groupset
1 review
Crank Ratio
Please select: Crank Ratio
to see the stock
Crank Length
Please select: Crank Length
to see the stock
From 1,574.60 1,016.53 discount
Please select an option to view the stock

  • Ordered now, delivered on Wednesday
  • Free tracked delivery to Ireland

Ask a question about this product

Email Customer Service
mantel-customer-service

Pros & Cons

Pros & Cons

  • Great shifting performance, quick and smooth shifting when you're standing on the pedals.
  • Amazing modulated braking power without abrupt clamping of the brakes.
  • Semi-wireless, there's only a cable connection between the battery, front and rear derailleur. This makes for easier mounting and less chance of cable breakage.
  • You can bleed the brakes without unscrewing the caliper from the frame. Pretty convenient!
  • The derailleurs only need to be adjusted once thanks to Di2 electronic shifting. After this, you'll be ready for the rest of your road bike's life.
  • Ultegra R8100 Di2 Disc is not the most lightweight groupset, and is heavier than Shimano Dura Ace R9200 Di2 Disc.
Read more on what our customers have to say about this product

Specifications

Specifications

Brand
Shimano
Bike Type
Road bike
Type
Double
Diameter
160 mm
Number of gears
12 speed
Brake Type
Disc Flat Mount
Cassette Ratio
11 / 30
What groupset do you have?
Shimano Ultegra
Crankset Type
Double
All specifications

Description

Description

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
Show more Show less

Review

Review


5 / 5

Great shopping experience

- William 22 March 2024

Super, complete groupset with even a bottom bracket that's not marked in the pack.

Automatic translation

5

William, 22 March 2024

Great shopping experience

Super, complete groupset with even a bottom bracket that's not marked in the pack.

Automatic translation

Frequently bought together


Recommended by the product specialist

Recommended by the product specialist


Related products

Related products

Shimano Ultegra R8100 Di2 Disc
Shimano Ultegra R8100 Di2 Disc
From 1,574.60
This product
Shimano 105 R7170 Di2 Disc
Shimano 105 R7170 Di2 Disc
From 1,147.66
SRAM Force Etap AXS D1 12 speed
SRAM Force Etap AXS D1 12 speed
1,625.43
SRAM Red eTAP AXS
SRAM Red eTAP AXS
From 1,523.78
Compare the products above
Shimano Ultegra R8100 Di2 Disc Shimano 105 R7170 Di2 Disc SRAM Force Etap AXS D1 12 speed SRAM Red eTAP AXS
Shimano Ultegra R8100 Di2 Disc Shimano 105 R7170 Di2 Disc SRAM Force Etap AXS D1 12 speed SRAM Red eTAP AXS
1 review 1 review 0 reviews 11 reviews
Bike Type Road bike Road bike
Type Double
Diameter 160 mm
Number of gears 12 speed 12 speed 12 speed 12 speed
Brake Type Disc Flat Mount Disc Flat Mount Disc Flat Mount Disc Flat Mount
Crank Ratio 50 / 34 / 52 / 36 50 / 34 / 52 / 36 46 / 33
From 1,574.60 From 1,147.66 1,625.43 From 1,523.78
This product View product View product View product

All specifications

General

Brand
Shimano
Bike Type
Road bike
Type
Double
Number of gears
12 speed
Brake Type
Disc Flat Mount
Cassette Ratio
11 / 30
What groupset do you have?
Shimano Ultegra
Crankset Type
Double
Brake Disc Mounting
Centerlock
Diameter Disc Brake Rotor
160 mm front / 160 mm rear
Junction Type
Internal
Type
2x12
Shifting Type
Electronic
Front Derailleur
Braze-on
Cage Length
Medium Cage
Bottom Bracket
No, not included
Cables
Electronic derailleur cables / Hydraulic brake lines / Charger cable
Crankset (Axle) Type
Hollowtech II
Colour
Grey

Sizes

Diameter
160 mm