Shimano Dura Ace 12-speed Di2 R9250 power meter road bike groupset

The Dura Ace 12x2-speed groupset for rim brakes with the power meter crankset. The Di2 shift and brake levers for rim brakes are not wireless.

Contents of the Shimano Dura Ace R9250 Di2 Powermeter drivetrain and groupset:

• Shimano Dura Ace Di2 12-speed rear derailleur, RD-R9250
• Shimano Dura Ace Di2 front derailleur, brazed-on mount, FD-R9250
• Optional Shimano derailleur clamp, 34.9 mm or 31.8/28.6 mm SMAD91
• Shimano Dura Ace STI, Dual Control shift lever, 2x12-speed, ST-R9250
• Shimano Di2 cable set, 5 pieces, EW-SD300
• Shimano Di2 battery, internal round, BT-DN300
• Junction Port, EWJC304
• Shimano Dura Ace cassette, available in 2 configurations, CS-R9200
• Shimano Dura Ace chain, CNM9100
• Shimano Dura Ace power meter crankset, 54/40, 52/36 or 50/34 tooth options, FCR9200-P
• Optional charging cable, EW-EC300
• Optional Shimano Dura Ace rim brakes, classic or direct mount, BR-R9200
• Optional Shimano bottom bracket, BB-R9100 BSA or Italian thread or Pressfit BB86, or Wheels MFG bottom bracket for BB30, Pressfit30, BBright, T47 or BB386 bottom bracket shells

Shimano Dura Ace RD-R9250 Di2 rear derailleur:

The new Dura Ace Di2 rear derailleur is the centrepiece of the new Di2 12-speed groupset. It provides the wireless functionality and connection to external components, and also includes the charging port, replacing the previous SM-BCR2 charger. The rear derailleur also houses the transmitter for wireless communication with the STI shifters and other external devices, including those from third-party manufacturers. Furthermore, it features the status LED and the adjustment button, which is used, for example, to switch between Synchro-Shift modes, meaning that the previous Junction A Port, SM-RS910, is no longer required.

Precise, lightning-fast shifting at the touch of a button, in any situation. The Shimano Dura Ace Di2 RD R9250 rear derailleur is even more compact and lighter than its predecessor and features E-Tube connectors for extremely easy installation. Equipped with a crash mechanism that disconnects the link to the motor in the event of strong external forces to prevent damage.

Shimano Dura Ace FD-R9250 Di2 front derailleur:

Lighter, faster and more aerodynamic: the Dura-Ace 12-speed Di2 front derailleur. Designed for chainring sizes ranging from 50/34 to 54/40 teeth, the new 12-speed Dura-Ace Di2 front derailleur operates even faster and more precisely. More compact and faster than ever before, the Dura Ace R9250 front derailleur delivers shifts with digital precision in all conditions. By combining Shimano’s new Di2 platform with the road bike version of Hyperglide+, the Dura Ace R9250 front derailleur shifts between chainrings as quickly and seamlessly as no other model on the market.

Shimano Dura Ace Di2 ST-R9250 shift/brake levers:

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 provide the optimal balance of comfort and control. Road cyclists will now 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. In addition, the shift-brake levers feature classic cable connections for mounting additional shift levers.

Shimano Dura-Ace BR R9200 / BR B9210 rim brake:

The elegantly designed rim brake of the R9200 series, with its lightweight dual-pivot brake body, offers maximum precision for better control and greater reliability in races. Thanks to the additional reinforcement booster, the Dura Ace BR R9200 brakes offer unprecedented torsional stiffness. The rim brake is easy to adjust and maintain thanks to straightforward tool access and the ability to change wheels quickly.

Shimano Dura Ace FC-R9200-P Power Meter Technology:

The newly developed power meter crankset from the Dura Ace series with power measurement on both sides. The power meter’s central unit is compactly positioned behind the crankset spindle, and the strain gauges are integrated into the right and left crank arms. Thanks to the battery integrated into the axle, the Bluetooth interface and the ability to update the power meter’s firmware via the E-Tube platform. The Bluetooth® LE and ANT+ interfaces are compatible with many cycle computers. The power meter features a small magnetic adapter for charging the battery. This ensures the system is completely waterproof and offers an elegant design. Perhaps most importantly, however, are the battery life, the ease of charging, and the ANT+ and Bluetooth® LE connectivity, which make recording and utilising training data easier than ever before. Shimano power metre cranksets contain a total of 24 sensors – 12 per side – in a full-bridge configuration*.

To accurately separate the force applied to the cranks in the tangential and normal directions, each sensor is positioned at an angle to compensate for crank deformation. This uniquely designed sensor increases measurement accuracy and enables the measurement of force vectors.

Shimano Power Vector Analysis

When used with Shimano Connect LAB, Shimano powermeters can analyse pedalling efficiency whilst riding or on your home PC. This requires Shimano’s E-Tube Ride app. Unfortunately, it is not compatible with Garmin devices.

When developing power metre cranks, SHIMANO engineers take into account the crank design, the manufacturing process, the materials used, and the crank’s flex under load. It is precisely this expert knowledge that enables Shimano to achieve such high-precision force vector measurement. Thanks to the latest technology and Shimano’s industry-leading expertise, the latest SHIMANO power metre cranks are cutting-edge training tools. The Dura-Ace power metre cranksets feature a total of 24 sensors – 12 on each side – in a full-bridge configuration. To accurately separate the force applied to the cranks in the tangential and normal directions, each sensor is positioned at an angle to compensate for crank deflection. This uniquely designed sensor enhances measurement accuracy and enables the measurement of force vectors. Power is important, but a raw power figure alone doesn’t give you the full picture. If you understand how you generate power and find ways to improve your efficiency, you can take your performance to a new level. Shimano’s power vector function provides real-time feedback on your pedalling, giving you a better understanding of your pedalling effort.

Optional bottom bracket:

We offer optional bottom brackets from Shimano, Wheels Manufacturing and FSA for the Shimano Dura-Ace Di2 groupset. This allows the crankset to be fitted to all standard bottom bracket shells.

Shimano Dura Ace CS-R9200 cassette:

The Shimano Dura Ace CSR9200 cassette, featuring two large sprocket blocks and titanium sprockets on an aluminium spider, delivers Shimano’s outstanding smooth shifting performance combined with low weight and long-lasting durability. Shimano offers replacement sprockets for these cassettes. This means that if only a few are worn, they can be replaced cost-effectively.

The new Hyperglide+ cassettes set new standards for shifting, thanks to smooth gear changes across the entire gear range. Even when applying maximum force on climbs or sprinting to the finish line, riders no longer need to worry about changing gears. In all gears, the Dura-Ace R9200 drivetrain ensures maximum efficiency thanks to larger teeth. Despite their expansion to 12 speeds without adding weight, Dura-Ace CS-R9200 cassettes set new standards for road bike shifting systems.

The 12-speed cassettes are compatible with both the new HG12 and the previous HG11 freehub bodies. The new 12-speed freehub bodies feature finer teeth. This allows for a significantly better connection between the cassette and the freehub body.

Shimano Dura Ace CN - M9100 chain:

The Shimano chain for 12-speed road bike and MTB drivetrains. The special asymmetrical outer and inner links, combined with Shimano’s SIL-TEC surface coating, minimise friction, optimise performance and also reduce dirt build-up.

The chain is perfectly matched to the 12-speed Shimano chainrings with Dynamic Chain Engagement+ (DCE+) tooth profiles. The HG Plus chain has been completely redesigned and features even finer, precision-machined contact surfaces with the sprockets and chainrings, particularly on the inner links. Furthermore, the inner links are chrome-plated, making them even more durable whilst delivering excellent shifting performance when shifting up or down.

Synchro-Shift Technology

Synchro-Shift technology greatly simplifies shifting and significantly reduces the number of decision-making processes that take place whilst riding. Particularly in crucial race situations or when riding at the limit, riders often have to navigate a multitude of decision-making processes alongside the physical strain, which are frequently disrupted and lead to incorrect decisions. The fewer decisions there are to make, the better the decisions will be and the more attention can be focused on the race. This is precisely what Shimano Synchro-Shift technology enables, always selecting the optimal next-higher or next-lower gear combination, regardless of whether this requires shifting at the rear derailleur and/or the front derailleur.

Shimano Synchro-Shift functions

• Full Synchro-Shift: The front derailleur reacts to the shifts the rider makes on the rear derailleur. Essentially, this means that only one shifter with two levers is needed to operate both the rear and front derailleurs.
• Semi Synchro-Shift: The rear derailleur responds to the gear changes the rider makes on the front derailleur. The rear derailleur automatically performs the necessary compensatory shifting.

Shimano Di2 Rim Brake Installation:

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

Unlike the disc brake version, the Di2 12-speed STI shift levers for rim brakes are not wireless and require the EW-JC304 junction port for cabling. This provides 4 connectors to link the EW SD300 cables to the battery. A total of 5 cables are required: 2 cables of approx. 60 cm from the STI to the Junction Port and 1 cable of approx. 140 cm 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.

Compatible bottom bracket shells

There is now a wide variety of bottom bracket shells available on modern frames. Shimano only offers compatible bottom brackets for some of these. To ensure the Ultegra groupset fits all frames, we supply optional FSA or Wheels MFG bottom brackets for the bottom bracket shells for which Shimano does not offer bottom brackets. Wheels Outboard bottom brackets are significantly more durable than standard press-fit bearings, as the bearing cups are bolted together, ensuring they sit flat and securely within the frame. Wheels bearings are available in various quality grades: ABEC3 standard bearings, angular contact bearings and ceramic bearings.

• BSA threaded housing, 68 mm installation width
  Shimano SM-BBR60B bottom bracket
• BSA threaded housing, 70 mm installation width
  Shimano SM-BBR60I bottom bracket
• Pressfit BB86 housing, installation width 86.5 mm, press-fit diameter 41 mm, Shimano
  SM-BB71-41B bottom bracket or Wheels MFG Outboard
  BB86-OUT-BB bottom bracket
• BB30 shell, installation width 68 mm, press-fit depth 42 mm, Wheels MFG
  Outboard BB30-OUT bottom bracket
• BB30A shell, installation width 73 mm (asymmetrical), press-fit depth 42 mm, Wheels MFG Outboard
  BB30A-OUT-SHIM bottom bracket
• Pressfit 30 shell, installation width 68 mm, press fit 46 mm Wheels MFG Outboard
  PF30-OUT bottom bracket
• Pressfit 30A shell, installation width 68 mm asymmetrical, press-fit dimension 46 mm, Wheels MFG Outboard
  PF30A-OUT-SHIM bottom bracket
• BBRight housing, installation width 79 mm, press-fit dimension 46 mm Wheels MFG Outboard
  BBRIGHT-OUT bottom bracket
• BB386 shell, installation width 86.5 mm, press-fit dimension 46 mm, Wheels MFG Outboard
  386EVOBB-SHIMBB bottom bracket
• Trek BB90 shell, installation width 90 mm, press-fit dimension 41 mm FSA
  230-600 bottom bracket
• T47 threaded shell, installation width
  68–73 mm Wheels MFG Outboard T47-OUT-SHIM
• T47 threaded shell, installation width 86–89.5 mm
  Wheels MFG Inboard T47-BB-SHIM
• T47 threaded shell, installation width 77.79 mm asymmetrical Wheels MFG
  BB-T47A-24MM bottom bracket

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