Shimano 105 R7170 Di2 2×12 Speed Road Groupset – Electronic Shifting

Product Description:

The Shimano 105 R7170 Di2 2×12 Groupset brings premium electronic shifting technology to a more affordable performance level. Featuring Shimano’s latest 12-speed drivetrain architecture, semi-wireless Di2 shifting, and refined braking performance, this groupset offers exceptional smoothness, accuracy and reliability for modern road bikes. Ideal for upgrades or new builds, the R7170 delivers fast, precise shifting and a clean, cable-free cockpit feel.

Features:

• Semi-wireless Di2 system – wireless shifters with wired derailleurs for maximum stability

• 12-speed rear shifting with wide-range cassette options for climbing and performance riding

• 2× front system for smooth gear transitions and optimal cadence control

• Rapid, precise electronic shifting under all riding conditions

• Improved disc-brake performance with better pad clearance and quieter operation

• Clean handlebar setup with no shift cables

• Compatible with Shimano E-Tube Project for customization and firmware updates

Specifications:

• Model: Shimano 105 Di2 R7170 Series

• Drivetrain: 2×12 speed

• Shifters: ST-R7170 Wireless Dual Control Levers

• Front Derailleur: FD-R7150 Di2

• Rear Derailleur: RD-R7150 Di2 (12-speed)

• Crankset: FC-R7100 (50/34T - 170mm) (Optional)

• Cassette: CS-R7101-34T or CS-HG710-36T

• Chain: CN-M7100

• Bottom Bracket: SM-BBR60-68mm (Optional) 

• Brake Type: BR-R7170 flat mount front and rear (hose length 1000mm/1700mm)   

• Battery: BT-DN300
• Electric wire: EW-SD300-I 1000mm*1 1400mm*1
  
  
• Charger: EW-EC300

Why Choose Shimano 105 Di2:

The 105 Di2 series inherits the same core performance from the Ultegra and Dura-Ace lines — ultra-smooth shifting, instant response, and long-term reliability — but at a significantly more affordable level. Perfect for endurance riders, racers, and cyclists upgrading from mechanical systems.