Shimano Ultegra Di2 R8170 2x12-Speed Upgrade Kit — Disc Brake

Upgrade to Race-Ready Electronic Shifting

The Shimano Ultegra Di2 R8170 groupset brings professional-level electronic shifting to your bike, using technology derived directly from Shimano's flagship Dura-Ace line. Every shift is instant, precise, and nearly silent — engineered to perform flawlessly whether you're sprinting, climbing, or cruising.

This 12-speed system pairs semi-wireless shifting with powerful hydraulic disc brakes for confident stopping power in any condition. The compact, low-profile derailleurs are built for smooth performance under load, and the whole system is fully customizable through Shimano's E-Tube app — letting you tailor shift logic, button functions, and firmware to your exact riding style.

Clean cockpit, minimal cable clutter, and class-leading reliability make this the ideal upgrade for riders who want their bike to feel as advanced as it looks.

Upgrade your road bike to fully electronic 12-speed shifting with this Shimano Ultegra Di2 R8170 kit. Precise, fast, customizable shifting paired with reliable hydraulic disc braking — everything you need to convert a mechanical setup to Di2 in one bundle.

Scope of Delivery:

• 1x Shimano ST-R8170 shift/brake lever (left) — Ultegra Di2, 2x12-speed + BR-R8170 Flat Mount disc brake, front
• 1x Shimano ST-R8170 shift/brake lever (right) — Ultegra Di2, 2x12-speed + BR-R8170 Flat Mount disc brake, rear (without 160mm adapter)
• 1x Shimano FD-R8150 front derailleur — Ultegra Di2, 2x12-speed
• 1x Shimano RD-R8150 rear derailleur — Ultegra Di2, 2x12-speed
• 1x Shimano BT-DN300 internal battery
• 1x Shimano EW-SD300-I E-Tube Di2 cable — 900mm
• 1x Shimano EW-SD300-I E-Tube Di2 cable — 1200mm
• 1x Shimano EW-EC300 charging cable

Note: Disc brake rotors not included