Shimano Ultegra R8170 Di2 Disc Groupset

Product Overview

Race-proven performance. Unbeatable value. The sweet spot of the Shimano road range.

The Shimano Ultegra R8170 Di2 Disc Groupset brings flagship-level electronic shifting and hydraulic disc braking to a more accessible price point. Sharing the same technological DNA as Dura-Ace, this 2×12-speed semi-wireless groupset delivers lightning-fast shifts, exceptional braking modulation, and the refined ergonomics that have made Ultegra the go-to choice for dedicated amateur racers and enthusiasts worldwide.

Technically similar to its Dura-Ace sibling, the R8170 groupset offers the same core performance—just with a slight weight penalty of approximately 278g. The result? A groupset that offers the best price-performance ratio in the road bike sector.

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Key Features

⚡ Semi-Wireless Di2 Electronic Shifting

• Wireless shift levers – shift commands are transmitted wirelessly to the front and rear derailleurs

• Central battery system – BT-DN300 battery (51.1g) conceals in the seatpost or seattube, wired to both derailleurs

• Lightning-fast shifts – rear shifting is up to 58% faster and front shifting up to 45% faster than previous generations

• CR1632 coin cell batteries in shifters provide 1.5 to 2 years of battery life

• Charging port conveniently integrated into the rear derailleur – no junction box required

🎛️ Fully Customisable via E-Tube App

• Adjust shift speed to your preference

• Select fully or semi-synchronous shift modes

• Assign functions to the programmable buttons on the shift levers

• Monitor battery status and system diagnostics

🛞 12-Speed Drivetrain

• 2×12-speed configuration – 24 total gear combinations

• Hyperglide+ tooth profiles on chainrings and cassette deliver improved shifting under load

• Smoother progression through the gear range

• Compatible with both 11-30T and 11-34T cassettes

🛑 Hydraulic Disc Brakes – Servo Wave Technology

• Redesigned BR-R8170 calipers provide more clearance between rotor and pad, reducing rubbing and noise in wet or gritty conditions

• Servo Wave technology speeds up initial lever travel so pads meet the rotor sooner, creating a more progressive, controllable feel

• Quieter operation and easier maintenance – bleeding and servicing are simpler than ever

• Ice-Tech rotors with FREEZA cooling fins (RT-CL800) feature a three-layer sandwich construction (stainless steel / aluminium core / stainless steel) that reduces system temperature by up to 150°C – delivering consistent braking performance even on long, steep descents

🖐️ Improved Ergonomics

• Raised, curved hood design offers a more comfortable, secure grip

• Increased space between the shift/brake lever and the handlebar improves comfort and control

• Individually adjustable grip width

• Rounded brake levers sit securely under your fingers even on long descents

🔧 Shadow RD Design

• Low-profile rear derailleur design reduces the risk of damage in crashes

• Compact design includes an integrated wireless unit, charger, and switch

• LED light on the rear derailleur indicates synchronised shift mode, setting mode, and charge requirements

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Specifications

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What's in the Box

Contents may vary depending on the retailer and configuration. A typical complete groupset includes:

• Shimano Ultegra Di2 ST-R8170 Shift / Brake Levers × 2 (Left + Right)

• Shimano Ultegra Di2 BR-R8170 Brake Calipers × 2 (Front + Rear)

• Shimano Ultegra Di2 FD-R8150 Front Derailleur

• Shimano Ultegra Di2 RD-R8150 Rear Derailleur

• Shimano Ultegra FC-R8100 Chainset (crank length and chainring options vary)

• Shimano Ultegra CS-R8100 Cassette (11-30T or 11-34T)

• Shimano CN-M8100 12-Speed Chain

• Shimano BT-DN300 Internal Battery

• Shimano EW-EC300 Charging Cable

• Shimano EW-SD300 E-Tube Wires × 2 (900mm + 1200mm)

• Shimano RT-CL800 Brake Rotors × 2

Note: Bottom bracket not included.

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Why Choose Ultegra R8170?

"With this Ultegra, Shimano offers the perfect groupset for the dedicated amateur rider."

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Technical Notes

⚠️ Bottom Bracket: Not included – purchase separately according to your frame's BB standard

⚠️ Semi-Wireless System: Shift levers are wireless; derailleurs connect to the central battery via E-Tube wires

⚠️ Battery Life: Shift lever coin cell batteries last 1.5 to 2 years; central battery typically lasts 1.5 to 2 years per charge

⚠️ Charging: Charge the system via the port on the rear derailleur – no junction box required

⚠️ Cassette Compatibility: Compatible with 11-30T or 11-34T cassettes

⚠️ Freehub: Requires HG 11-speed freehub body

⚠️ Chain Compatibility: Use Shimano 12-speed chains (CN-M8100 or CN-M9100)

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About Shimano Ultegra

Ultegra has long been the choice of serious amateur racers and enthusiasts who demand professional-level performance without the professional-level price tag. The R8170 Di2 groupset represents a quantum leap forward, bringing semi-wireless electronic shifting and advanced hydraulic disc braking to a wider audience. Sharing the same technological DNA as Dura-Ace, Ultegra R8170 delivers the "Science of Speed" – unparalleled control and comfort anytime, anywhere – whether you're competing in an amateur race, chasing a personal best, or enjoying a social ride.

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Upgrade to the sweet spot of Shimano's road range. Add to cart today!