Shimano Dura-Ace Di2 R9250 2x12 40-54 Groupset W/ Disc Brake

The Shimano Dura-Ace Di2 R9250 2x12 40-54 Groupset with Disc Brake is a high-end cycling component system designed for road bikes. 

Key features of this groupset include:

1. Electronic shifting: The Di2 electronic shifting system provides precise and quick shifting performance. It offers smooth and reliable gear changes, with the ability to shift under load.

2. 2x12 drivetrain: The groupset includes a dual chainring setup (40-54 tooth) at the front, along with a 12-speed cassette at the rear. This wide range of gears allows for efficient pedaling across different terrains and gradients.

3. Disc brakes: The groupset features hydraulic disc brakes for powerful and consistent stopping performance. This improves safety and control, especially in wet or muddy conditions.

4. Dura-Ace level: Shimano's Dura-Ace range represents their top-of-the-line components, known for their lightweight construction, high-quality materials, and exceptional performance. The R9250 model is the latest iteration of Dura-Ace, incorporating the latest advancements in technology and design.

5. Sleek and aerodynamic design: The groupset features a sleek and aerodynamic design, with cables and wires neatly integrated into the frame for a clean and minimalist look.

Overall, the Shimano Dura-Ace Di2 R9250 2x12 40-54 Groupset with Disc Brake offers professional-level performance and reliability for road cyclists looking for the best components available. However, it is worth noting that this groupset is quite expensive, and may be more suitable for serious cyclists or those competing at a high level.

FEATURES

- Battery mounting internally in the seatpost (adapter required), running time approx. 1000 km

- CR1632 battery in STI for wireless shifting

- Front derailleur with more compact design than previous model, connected to battery via cable

- Rear derailleur with wireless chip, LED display, charging socket and function button, connected to battery via cable

- Brake caliper with 10% more clearance for brake pads

SPECIFICATIONS

Series                          : Dura-Ace Di2 R9250

Application                  : Road, Triathlon & Time Trial

Shifters & Derailleurs  : 2x, 12-speed (electronic, semi-wireless)

Brakes                         : disc, hydraulic (flat mount)

COMPONENTS

Crank                           : 170.0 mm, 172.5 mm, 175.0 mm (gradation 40-54)

Cassette                       : 11-30, 11-34

Front Derailleur           : braze-on

Rear Derailleur            : long cage