Shimano 105 Di2 ST-R7170 STI disc with BR-R7170

The Di2 Disc wireless shift/brake levers, featuring a new ergonomic design, are characterised by higher horns that are also slightly angled inwards. In addition, the space between the brake lever and the handlebars has been slightly increased to enable 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 an adjustment and enlargement of the shift button design, 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. The 105 Di2 STI levers do not have an additional connection for full cabling or an auxiliary shift lever

Shimano 105 Disc Brake Caliper BR-R7170:

The BR-R7170 road bike disc brake calipers for the 12-speed 105 Di2 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 105 BR-R7170 brake caliper offers improved modulation, a quieter braking system and an extremely simple bleeding process. The 105 R7170 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 bleed system has been redesigned and made significantly simpler.

The new Shimano 105 utilises a hybrid system comprising a wireless connection between the cockpit components and a cable connection between the rear derailleur, front derailleur and the central battery – usually housed in the seat tube – ensuring maximum reliability in all conditions. And just like its big brothers DURA-ACE and ULTEGRA, the SHIMANO 105 also excels thanks to extensive options for quickly and easily customising it to the rider’s wishes and preferences via the E-TUBE app.

Via E-TUBE PROJECT, the gear system can be individually configured by, for example, adjusting the shift speed, the number of shifts when the button is held down, or the Synchro-Shift and Semi-Synchro-Shift functionality.

Furthermore, the system can be paired with many third-party cycle computers, including Garmin and Wahoo. This allows these devices to display, for example, the current gear or the battery charge level.

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 105 Di2 Shift/Brake Levers ST-R7170 Technical Specifications:

• For 12/2-speed drivetrains
• Wireless function
• CR1632 batteries
• Adjustable grip width
• Compatible with 12-speed Dura-Ace, Ultegra and 105 Di2 rear derailleurs and front derailleurs
• Equipped with programmable Multishift function
• Brake fluid required: mineral oil
• Required brake line: SM-BH90-JK-SSR
• Weight: 215 grams (manufacturer’s specification)

Shimano 105 BRR7170 Flat Mount brake caliper Technical specifications:

• Aluminium brake caliper, flat mount
• 2-piston system
• Recommended brake lever: STR7170
• Weight: approx. 196 grams Manufacturer’s specification
• Flat Mount standard
• Recommended brake hose: SM-BH-90-JK-SSR
• Recommended brake discs: Shimano IceTec SM-RT70

Included in delivery:

Shimano 105 STI shift/brake lever STR7170, brake hose SM-BH-90-JK-SSR (95 cm), brake caliper BRR7170, brake pads, front wheel adapter, fixing screws, hose connector and pin for hose installation, oil not included

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