Shimano 105 R7170 Di2 Disc Groupset

Shimano 105 R7170 Di2 Disc Groupset
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Our choice for an electronic groupset

Our choice for an electronic groupset

The Shimano 105 R7170 Di2 Disc groupset is an electronic groupset with 2 x 12 gears. Very good and reliable shifting performance. Even being able to shift under load is effortless. More space between the brake pads and brake discs to prevent brake disc galling. A Shimano groupset at 105 level is closer than ever to the performance of the Shimano Ultegra and Dura-Ace groupsets!

Pros & Cons

Pros & Cons

  • Precise shifting performance and high speed shifting, even when standing on the pedals.
  • The brake lever is adjustable and the rotors are less prone to rubbing, improving your control while braking.
  • Semi-wireless, just a cable between the battery, front and rear derailleur. Easy to mount and low risk of cable failure.
  • You can bleed the brakes without dismounting the caliper from the frame. Pretty convenient!
  • One time only positioning of the derailleurs and you are ready for the rest of your road bike's life. The shifter's battery life lasts an impressive 3 years.
  • The Shimano 105 R7100 Di2 Disc groupset uses heavier materials in its components. This is reflected in the total weight of the groupset.
Read more on what our customers have to say about this product

Specifications

Specifications

Brand
Shimano
Bike Type
Road bike
Gear Shift Type
Electronic
Suitable for
Shimano 105 R7100
Drivetrain Type
2 x 12
Length
600 mm / 1200 mm
Mount
Braze
Maximum Capacity
41T
Crankset axle fit
Shimano Hollowtech II (24 mm)
All specifications

Description

Description

The Shimano 105 R7100 Di2 Disc electronic 12-speed groupset has disc brakes and is semi-wireless, just like the Shimano Ultegra 8100 and the Shimano Dura-Ace 9270! The Shimano 105 R7100 Di2 Disc groupset is an attractive choice for cyclists looking for the shifting performance of an Ultegra or Dura Ace groupset at a more affordable price level. You get a lot of value for your money. Faster and smoother shifting, even under heavy load. Reliable and direct braking with more control. And a large gear range with chainrings of 50-34 with a cassette option of 11-34!

Shifters
The shifters' ergonomics have been further improved. It is easier to position your fingers under the shifters and the shifter covers offer more grip. Moreover, it is easier to adopt different hand positions. The stroke of the brake levers is adjustable, making the brakes suitable for cyclists with smaller hands as well. In addition, the height of the Di2 buttons has been increased by 1.5 mm for both buttons.This makes it easier to operate the buttons even when wearing gloves or in the cold.

Disc brakes
The disc brakes have also been upgraded. The CNC milled aluminium Shimano 105 caliper is made up of 2 parts. As with the Dura-Ace and Ultegra calipers, 10% more space has been created between the brake pads and the rotors. This has ensured that the brakes do not, or hardly, rub when you are not braking. Nothing is more annoying than rotors rubbing up during a climb or a sprint. In addition, the braking power and control have noticeably improved.

Derailleurs
The shifting speed of the front and rear derailleurs has been increased significantly. By 58% and 45% respectively compared to the previous Shimano Di2 derailleurs. They have also been further improved, in particular to ensure better gear shifting under load. This is immediately noticeable when climbing uphill or when accelerating.

Technology

Hyperglide
Hyperglide cassettes are available in different ratios. These ratios all feature the 'sweet spots', on the 6th, 7th and 8th sprockets. 12 speed makes it possible to keep the cogs that are most comfortable to ride at medium speeds despite large ratio differences. The cassettes come with the HG mounting pattern, which is also compatible with all Shimano HG 11 speed bodies.

Semi-wireless
This Shimano 105 R7100 Di2 Disc group only has a cable connection between the battery, front and rear derailleur. The shifting performance has been taken to an even higher level. Not only has the shifting speed been increased, you can now also shift more smoothly under load. Also, there is no need for a junction box anymore, 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 each contain a button cell batteries which will last up to 3 years before needing to be replaced.

Maintenance of brakes
Maintenance of the brakes is simplified. It is possible to bleed the brake without removing the caliper from the frame, thanks to a separate bleeding port and a rotary valve. A new funnel and spacer for bleeding the caliper help optimise the bleeding process.

Shimano DI2 app
All adjustment possibilities, such as assigning shift buttons, shifting way or adjusting shifting speed, can be done via the Shimano Di2 app. The function of the shift buttons can be adjusted individually. The synchronized shift or semi-synchronized shift where the front derailleur automatically shifts to the ideal chainline is still possible.

Delivery includes

• Shimano 105 Di2 ST-R7170 Shifters (front & rear)
• Shimano 105 BR-R7170 Brake Calipers (front & rear)
• Shimano 105 FD-R7150 Front Derailleur
• Shimano 105 RD-R7150 Rear Derailleur
• Shimano 105 FC-R7100 50/34T Crankset
• Shimano 105 CS-R7100 11-34T 12 Speed Cassette
• Shimano 105 CN-M7100 12 Speed Chain
• Shimano RT70 160 mm Center Lock Rotor
• Shimano RT70 160 mm Center Lock Rotor
• Electric Wire 600 mm Black
• Electric Wire 1200 mm Black
• Charging Cable 1700 mm
• Internal Battery
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Review

Review


4 / 5

Already a good group

- LUDOVIC 22 November 2022

Brand new use. Good precision. To be seen over time (wear)

Pros & Cons

Easy to install
Easy to maintain
Reliable
The price
Automatic translation

4

LUDOVIC, 22 November 2022

Already a good group

Brand new use. Good precision. To be seen over time (wear)

  • Easy to install
  • Easy to maintain
  • Reliable
  • The price
Automatic translation

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1 review 1 review 0 reviews 11 reviews
Bike Type Road bike Road bike
Gear Shift Type Electronic
Suitable for Shimano 105 R7100
Drivetrain Type 2 x 12
Length 600 mm / 1200 mm
Mount Braze
From 1,147.66 From 1,574.60 1,625.43 From 1,523.78
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All specifications

General

Brand
Shimano
Bike Type
Road bike
Gear Shift Type
Electronic
Suitable for
Shimano 105 R7100
Drivetrain Type
2 x 12
Mount
Braze
Maximum Capacity
41T
Crankset axle fit
Shimano Hollowtech II (24 mm)
Compatible with
Disc brakes
Type of Brake
Hydraulic
Number of gears
12 speed
Brake Type
Disc Flat Mount
Cassette Ratio
11 / 34
What groupset do you have?
Shimano 105
Crankset Type
Double
Brake Disc Mounting
Centerlock
Junction Type
Internal
Type
2x12
Shifting Type
Electronic
Front Derailleur
Braze-on
Cage Length
Long Cage
Bottom Bracket
No, not included
Cables
Electronic derailleur cables / Hydraulic brake lines
Crankset (Axle) Type
Hollowtech II
Colour
Black

Sizes

Length
600 mm / 1200 mm