Shimano Ultegra Di2 ST-R8150 STI shift lever

The new Ultegra ST-R8150 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 shifting. The 12-speed Ultegra Di2 shifters for rim brakes do not feature the wireless function and are connected to the battery via a cable.

Shimano Ultegra Di2 shift/brake lever ST R8150:

The Di2 shift/brake levers with a new ergonomic shape. These STI levers do not have a wireless function and require cabling. 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 now be able to grip the new levers more securely and comfortably with their thumb and index finger, whilst the remaining three fingers can be positioned comfortably between the handlebars and the brake lever. 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. Additionally, the shift-brake levers feature classic cable connections for mounting additional shift levers.

Shimano Di2 installation:

Installing Shimano Di2 components is almost easier than fitting traditional gear systems. The standardised cable connections and the junction box ensure straightforward and quick installation. The shift levers are connected to the EW-JC304 junction box.

Unlike the disc brake version, the Ultegra STI shifters for rim brakes are not wireless and require Junction Port B for cabling. This provides 4 connectors to link the EW SD300 cables to the battery. A total of 5 cables are required: 2 cables, approx. 60 cm long, from the STI to the Junction Port, and 1 cable, approx. 140 cm long, from the Junction Port to the battery. Due to its small size, the Junction Port can be easily stowed in the down tube of the frame without any additional mounting aids. In addition, a power supply cable of 120 cm for the rear derailleur and 60 cm for the front derailleur is required.

Shimano Ultegra Di2 STI shift/brake levers ST-R8150 Technical data:

• For 12/2-speed drivetrains with rim brakes
• CR1632 batteries
• Adjustable grip width
• Compatible with 12-speed Dura-Ace and Ultegra Di2 rear derailleurs and front derailleurs
• Cable connections: 2 x SD300
• Equipped with programmable Multishift function
• Weight: 150 grams (manufacturer’s specification)

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