SKU: 57605081942

Shimano 105 Di2 R7100 12-speed Disc Brake Groupset - 172.5mm 50/34T

Sale price$778.50 Regular price$865.00
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Description

Shimano 105 Di2 R7100 12-speed Disc Brake Groupset - 172.5mm 50/34TLooking to upgrade your drivetrain? Then look no further. The new Shimano 105 Di2 R7100 groupset brings Di2 shifting to a new affordable pricepoint. With functions and tech inherited directly from their DURA ACE and ULTEGRA drivetrains, 105 Di2 is the culmination of years of research and development. Thanks to a shared Di2 platform, sophisticated ergonomics, 105 optimised gear combinations and an exceptional brake system, Shimano 105 Di2 marks a new

Looking to upgrade your drivetrain? Then look no further. The new Shimano 105 Di2 R7100 groupset brings Di2 shifting to a new affordable pricepoint. With functions and tech inherited directly from their DURA-ACE and ULTEGRA drivetrains, 105 Di2 is the culmination of years of research and development. Thanks to a shared Di2 platform, sophisticated ergonomics, 105-optimised gear combinations and an exceptional brake system, Shimano 105 Di2 marks a new era of affordable performance.

Going electronic also lets you shift lightning-fast under load – such as when climbing or sprinting, customise how you shift and change gear without performance loss. Wireless shifting brings a clean cockpit free of shift wires and ports. While the internal Di2 battery is concealed in the seat post or frameset.

The new 12-speed cassette is the same width as Shimano's previous 11-speed cassette, so the space between each cog is narrower. This means shifts so smooth you’ll barely notice them.

Key Features:

  • Wireless Di2 Shift Levers for a cleaner cockpit with 3 year battery life
  • Lightning-fast precision shifts at the touch of a button
  • Revised STI ergonomics
  • 10% extra brake pad clearance
  • Battery life of up to 1000km between charges
  • Fully customiable shifting via the Shimano E-TUBE app
  • Total Weight (approx):3,067g

Groupset Includes:
  • Shimano 105 Di2 ST-R7170 hydraulic disc STI Brake/Shift Levers (left + right)
  • Shimano 105 Di2 FC-R7100 105 double 12-speed chainset, 172.5mm 50 / 34T
  • Shimano 105 Di2 RD-R7150 105 Di2 12-speed rear derailleur
  • Shimano 105 Di2 FD-R7150 105 Di2 12-speed front derailleur, braze-on
  • Shimano 105 Di2 CS-R7100 105 12-speed cassette, 11 - 34T
  • Shimano CN-M7100 SLX/Road chain with quick link, 12-speed, 126L
  • Shimano SM-RT70 Ice Tech Centre-Lock brake disc rotors (160/140mm) with internal lockring
  • Shimano Di2 E-tube SEIS battery
  • Shimano Di2 EW-EC300 charging cable - 1700 mm
  • Shimano Di2 EW-SD300 E-tube Di2 electric wires (900/1200mm)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 57605081942

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hsofstuartltd
Port Orchard, US
★★★★★ 5
Great socks!
Size: Medium, Color: Black
I love these socks. Very soft and comfortable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 21, 2026
S
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Sallie Miller
Grantham, US
★★★★★ 5
Good socks
Size: Medium, Color: Black
Socks wear reasonably well. They are comfortable.
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Reviewed in the United States on February 4, 2026
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Joey
Phoenix, US
★★★★★ 5
Very comfy
Size: X-Large, Color: White
I'm a size US Mens 14 with huge calves. Finding comfortable crew socks can be somewhat difficult. These are extremely comfortable, very stretchy and soft. Very worth the price.
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Reviewed in the United States on November 4, 2025
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SG
Port Orchard, US
★★★★★ 5
I use these exclusively for when I'm hiking, cycling and walking ( exercising )
Size: X-Large, Color: Black
5.7.2019 Update: I have probably five packs of 3 of these socks. Can't explain it but recent pairs I've been using have lasted longer than previous two packs ( 6 socks )... So I'm going to get some more... They are my #1 go to sock for cycling, hiking, climbing, walking ( serious, training, speed, distance )... 10.30.19: I use these exclusively for when I'm hiking, cycling anqd walking ( exeqrcising )... They are light, comfortable, keep feet dry, cool & comfortable... They don't shift around on feet. They stay put once put on and running, climbing or cycling shoes are put on and laced up or ratched... I do a lot of hill climbing and also use on terrain where there's lots of long periods ( hours ) going up & hours going down... They don't appear to be very durable, get holes in toe or holes in heels, but 3 pack is relatively inexpensive so I continue to buy them. I do not use them for everyday casual wear because they would wear out very quickly compared to other similar sockets...
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Reviewed in the United States on October 30, 2018
C
Verified Purchase
Chris
Lexington, US
★★★★★ 4
These socks are just OK. One arrived with a ...
These socks are just OK. One arrived with a hole (easily sewn up, but kind of bummed about that). I prefer the Under Armour Resistor socks - they have support built into the socks that you actually can feel, and they were same price for 6 pairs!
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Reviewed in the United States on March 2, 2017

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