Dura-Ace Di2 R9250 2x12 34-50 Groupset w/ Disc Brake - black/172.5 mm 34-50, 11-30

Shimano Dura-Ace Di2 R9250 2x12 34-50 Groupset w/ Disc Brake

Item number: 88269

The Shimano Dura-Ace Di2 R9250 2x12-speed Groupset with 34-50 Crank and Disc Brake - Experience the Science of Speed

The Dura-Ace Di2 R9250 Road groupset by Shimano consists of a 2x12-speed crank with 34-50 tooth gradation, a flat-mount disc brake set and an electronic rear derailleur and front derailleur for semi-wireless shifting. Of course, a rechargeable battery, a Quick-Link chain and a cassette with 11-30 or 11-34 teeth are also included.

Shimano has uncompromisingly designed the Dura-Ace R9250 for speed and performance. User-friendliness, efficiency and safety also played a major role in development. That's why the groupset works without cables at the crucial point, namely the interaction between STIs and rear derailleur. Cables are only used between the battery and the rear derailleur or front derailleur. The wireless protocol is extremely fast and reliable, which raises the shifting speed to a new level - with consistently high precision. A twelfth sprocket on the cassette in combination with a very clever gradation means that you have a wider gear selection at your disposal, and are optimally prepared for any terrain. In addition, Hyperglide+ technology familiar in MTB sport ensures smooth gliding of the chain even under loads. Conveniently, the Dura-Ace 12-speed cassettes are also compatible with older Shimano road freehubs. Last but not least, the disc brakes have been thoroughly revised and equipped with servo-wave technology. This way, the full braking power is not only available more quickly, but can also be modulated better. A simplified bleeding process and more free space for the brake pads are further advantages.

Information regarding the return of batteries and electrical equipment:

Information on the return and disposal of batteries and electrical equipment can be found here.


Dura-Ace Di2 R9250
Road, Triathlon & Time Trial
Shifters & Derailleurs:
2x, 12-speed (electronic, semi-wireless)
disc, hydraulic (flat mount)


170.0 mm, 172.5 mm, 175.0 mm (gradation 34-50)
11-30, 11-34
Front Derailleur:
Rear Derailleur:
long cage


  • 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

Additional Components Needed:

The following components are still required for the Dura-Ace Di2 R9250/70 groupset's semi-wireless start-up:
  • Bottom Bracket: Shimano recommends BB-R9100 or SM-BB92-41B Pressfit Hollowtech II.
  • 2 x RT-MT900 brake rotors (140 or 160 mm)
  • 2 x EW-SD300-I power cables: 1 x from battery to front derailleur (max. 1500 mm) and 1 x from battery to rear derailleur (max. 1700 mm)*
  • recommended: rubber grommets for internal cable routing
  • if required, FM-to-FM brake adapter SM-MA-R160 D/D for 160 mm brake rotors on 140 mm FM frame
  • if necessary, brake caliper bolts for 20 and 30 mm frame diameter (Type C and Type C2)

* To determine the correct cable lengths, the bike must be measured as follows:
  • Distance between battery and front derailleur
  • Distance between battery and rear derailleur = distance between battery and bottom bracket + distance between bottom bracket and rear derailleur

Completely wired installation via the EW-JC304 junction box is also possible. You can find more information in the Shimano manual or contact our service staff.


Shimano Dura-Ace R9250 Di2 2x12 34-50 groupset, comprising:
  • 1 x Shimano Dura-Ace crankset (FC-R9200)
  • 1 x Shimano Dura-Ace Di2 rear derailleur (RD-R9250)
  • 1 x Shimano Dura-Ace Di2 front derailleur (FD-R9250)
  • 1 x Shimano Di2 battery (BT-DN300)
  • 1 x Shimano Di2 charging cables (EW-EC300)
  • 1 x Shimano Dura-Ace cassette (CS-R9200)
  • 1 x Shimano XTR Quick-Link chain (CN-M9100)
  • 1 x pair Shimano Dura-Ace Disc Brakes (BR-R9270 + Di2 ST-R9270), front and rear
  • 1 x Shimano SM-BH90-JK-SSR brake hose, 1000 mm (front)
  • 1 x Shimano SM-BH90-JK-SSR brake hose, 1700 mm (rear)
  • 2 x pairs Shimano L03A brake pads
  • 1 x disc brake adapter for front 140/160 mm
  • 2 x hose connection set with olive (mounted) and insert pin
  • 2 x type A caliper bolts for front wheel
  • 2 x caliper bolts for 25 mm frame diameters, rear wheel
  • 1 x Shimano aluminium cassette lockring
  • 1 x Shimano master link
  • 1 x Shimano TL-EW300 cable tool
  • 1 x Shimano crank bolt
  • 2 x CR1632 for STIs battery
  • brake set ready for assembly, filled, bleeding is recommended after assembly

  • 100 day return period
  • Online since 1998
  • Trusted Shop 4.89 / 5.00


  • black/170.0 mm 34-50, 11-30, out of stock
  • black/170.0 mm 34-50, 11-34, in stock
  • black/172.5 mm 34-50, 11-30, out of stock
  • black/172.5 mm 34-50, 11-34, out of stock
  • black/175.0 mm 34-50, 11-30, out of stock
  • black/175.0 mm 34-50, 11-34, in stock

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