Shimano 105 celebrates its 40th anniversary with a major technological leap, the introduction of the Di2 R7100 Series. This marks the first time the 105 groupset features semi-wireless electronic shifting, offering precise gear changes, enhanced system reliability, and reduced maintenance demands. Built on the same Di2 platform as Dura-Ace and Ultegra, the R7100 delivers pro-level performance at a more attainable price point, staying true to 105’s legacy of bringing advanced road technology to a wider range of riders.

Included in this groupset :

• Shimano 105 Di2 R7170 Shifters/Levers
• Shimano 105 Hydraulic Calipers (front and rear)
• Shimano 105 Di2 R7150 12-Speed Rear Derailleur
• Shimano 105 Di2 R7150 12-Speed Front Derailleur (braze on)
• Shimano 105 Di2 R7100 12-Speed Chainset 50/34T (cranks 172.5mm)
• Shimano 105 Di2 R7101 12-Speed Cassette 11-34T
• Shimano 105/SLX M7100 12-Speed Chain 126L
• Di2 DN300 Internal Battery
• EWEC300 Charging Cable 1700mm
• E-tube Di2 SD300 1000mm
• E-tube Di2 SD300 1200mm

Shimano 105 Di2 employs a hybrid setup, combining wireless shifters with a wired connection linking the centrally housed seat tube battery to both derailleurs. This configuration ensures consistent, high-performance shifting and robust reliability across all conditions.

Customisation

Like its Dura-Ace and Ultegra counterparts, Shimano 105 Di2 offers extensive customisation via the intuitive E-TUBE PROJECT Cyclist app. Using your smartphone, you can fine-tune drivetrain settings, adjusting shift speed, configuring multi-shift button functions, and enabling Synchronized or Semi-Synchronized shifting modes to suit your riding preferences.

Connectivity

You can also pair the system with third party cycling computers such as Garmin and Wahoo, which allow you to monitor gear selection or battery status.

Shifters/Levers

Shimano 105 dual control levers use Shimano’s proprietary wireless integrated circuit, engineered for secure communication, rapid signal processing, and minimal power consumption. Compared to other wireless systems, this results in reduced signal interference, quicker shift response, and extended battery life. Power is supplied by a single rechargeable battery housed inside the frame, simplifying charging and providing full protection from the elements, delivering consistent, dependable shifting in all conditions.

The new dual control levers also feature unparalleled ergonomics refined with pro rider feedback where a raised hood peak and new lever shape enhance comfort and control in every riding position. Braking is also optimized thanks to a lighter, smoother lever action and expanded braking control area.

Drivetrain

With the transition to a 12-speed cassette, the Shimano 105 R7100 Series provides a broader gear range and refined gear progression for smoother, more efficient cadence control. Optimised drivetrain configurations including 11-34T and 11-36T cassettes paired with 50-34T or 52-36T chainsets, offer low gearing ratios, including sub-1:1 options. This setup allows riders to tackle steeper gradients with confidence while maintaining a consistent cadence thanks to tighter gear steps across the range.

Occasionally, without notice, manufacturers change product design and/or specifications.