Disc Shimano Ultegra Di2 ST-R8170 STI with BR-R8170

The new Ultegra ST-R8170 brake lever offers improved modulation and control on every ride thanks to Shimano’s proven Servo Wave technology. The brand-new Di2 platform is used on Dura-Ace and Ultegra, where it ensures the world’s fastest and most reliable wireless shifting.

The new Di2 platform for 12-speed components requires no cable connection to the rear derailleur or front derailleur. The Di2 Dual Control shift levers ST-R8170 have the necessary wireless module integrated. Power is supplied by CR1632 batteries, which have a service life of up to 2 years. The Di2 12-speed rear derailleur, with its additional wireless unit, acts as a receiver and distributor of shift signals and is connected to the battery and front derailleur for power supply and shift command transmission. Additional wireless components, including those from third-party manufacturers, can also be paired with the rear derailleur.

Shimano Ultegra Di2 Disc shift/brake lever ST R8170:

The Di2 Disc wireless shift/brake levers, with their new ergonomic shape, feature higher levers that are also slightly angled inwards. In addition, the space between the brake lever and the handlebars has been slightly increased to allow for the optimal balance of comfort and control. Road cyclists will be able to grip the new levers better and more securely with their thumb and index finger, whilst the remaining three fingers can be comfortably positioned between the handlebars and the brake lever. However, thanks to adjustments and enlargements to the design of the shift buttons, these remain easy to reach from the lower handlebar position. Furthermore, the two shift buttons on each STI lever are now positioned at a greater height difference from one another, enabling more intuitive operation, particularly with wet, cold fingers or full-finger gloves. In addition, the shift-brake levers feature classic cable connections for mounting additional shift levers.

Shimano Ultegra Disc Brake Caliper BR-R8170:

The BR-RS8170 road bike disc brake calipers for the 12-speed Ultegra groupset. These calipers are compatible with all Shimano disc brake levers. Recommended brake discs: RT-MT800. Thanks to the 10 per cent greater spacing between the brake pads, the brakes can be adjusted more effectively and noise is minimised.

The new Ultegra BR-R8170 brake caliper offers improved modulation, a quieter braking system and an extremely simple bleeding procedure. The Ultegra R8170 disc brake caliper offers road cyclists a completely new sense of control thanks to its improved modulation and faster-acting initial braking force. Despite its flatter design, the system produces less braking noise than ever before and is easier to maintain. The bleeding system has been redesigned and made significantly simpler.

Flat Mount Standard:

The new Flat Mount caliper standard for road bike brakes reduces weight and offers a significantly sleeker look. With the Flat Mount standard, the rear brake caliper sits directly on the chainstay; no adapter is required for mounting the brake caliper. The bolts pass through the chainstay from below directly into the brake caliper. A flat adapter is still required on the fork. The adapter is screwed onto the rear of the fork leg, with the brake sitting directly on the adapter.

Shimano 12-speed Di2 assembly:

Shift commands are transmitted wirelessly from the shift levers to the rear derailleur. Only the rear derailleur and front derailleur are now wired to the battery. This ensures a clean look and significantly reduces the installation effort. The shift levers are powered by CR1632 batteries. The shift levers feature an additional cable connection, allowing for the connection of auxiliary switches. Traditional cabling from the shift levers to the battery is also possible. The new battery has three slots.

Shimano Ultegra Di2 Shift/Brake Levers ST-R8170 Technical Specifications:

• For 12/2-speed drivetrains
• Wireless function with additional cable connections
• CR1632 batteries
• Adjustable grip width
• Compatible with 12-speed Dura-Ace and Ultegra Di2 rear derailleurs and front derailleurs
• Equipped with programmable multi-shift function
• Brake fluid required: mineral oil
• Required brake line: SM-BH90-JK-SSR
• Weight: 180 g

Shimano BRR8170 Flat Mount brake caliper Technical specifications:

• Aluminium brake caliper, flat mount installation
• 2-piston system
• Rensin L02A brake pads
• Recommended brake lever: STR8170
• Weight: approx. 146 g
• Flat Mount standard
• Recommended brake hose: SM-BH-90-JK-SSR
• Recommended brake discs: Shimano IceTec RT-MT800

Herstellerinformation: SHIMANO INC., 3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan, www.shimano.com | EU contact: Shimano Europe BV, High Tech Campus 92, 5656 AG Eindhoven, The Netherlands, www.shimano.com