Shimano Dura-Ace R9150 Di2 Rim Brake 11 Speed Groupset Review

shimano dura ace sm rt900 disc brake rotor

Shimano Dura-Ace R9150 Di2 Rim Brake 11 Speed Groupset—a pinnacle of performance and innovation for discerning cyclists.

Designed to provide better control and confidence in race conditions, this groupset offers dedicated brake levers, lightweight construction, and carbon composite hoods for optimal ergonomics. With more intuitive and precise shifting, customizable functions, and the option for multi-shift capabilities, it caters to individual riding styles.

In the following sections, we will delve deeper into its remarkable features and explore why it sets a new standard for high-performance groupsets.

Shimano Dura-Ace R9150 Di2 Rim Brake 11 Speed Groupset Key Specification

Here’s a table outlining the precise specifications of the Shimano Dura-Ace R9150 Di2 Rim Brake 11-Speed Groupset:

Groupset TypeElectronic Di2 Rim Brake 11-Speed Groupset
CompatibilityShimano Dura-Ace R9150 Series
Shift/Brake LeversDura-Ace R9150 Di2 STI Shift/Brake Levers (Dual Control Levers)
Front DerailleurDura-Ace R9150 Di2 Front Derailleur
Rear DerailleurDura-Ace R9150 Di2 Rear Derailleur
CassetteDura-Ace R9100 Cassette (11-speed)
ChainDura-Ace HG901-11 Chain
CranksetDura-Ace R9100 Crankset
Bottom BracketDura-Ace R9100 Bottom Bracket
Brake CalipersDura-Ace R9100 Brake Caliper Pair
Brake Mount TypeStandard Mount for Rim Brakes
Front Chainring OptionsVarious options available (e.g., 50-34T, 52-36T, 53-39T)
Rear Cassette OptionsVarious options available (e.g., 11-25T, 11-28T, 11-30T)
Shift ModesSynchronized Shift, Semi-Synchronized Shift, Manual Shift
BatteryInternal Lithium-Ion Battery (BT-DN110)
Battery ChargerExternal Battery Charger (SM-BCR2)
Junction ADi2 Handlebar Junction Box (SM-EW90-A)
Junction BDi2 Internal Junction Box (SM-JC41)
Front Derailleur Mount TypeBraze-on or Clamp-on
Rear Derailleur Max Sprocket30T (for short cage), 34T (for medium cage)
WeightLightweight design, precise materials and engineering for optimum performance
Recommended UseRoad cycling and racing


So let’s have a look at the features that make this groupset a great choice for any gravel enthusiast

Design and Comfort

Design and Comfort

The Shimano Dura-Ace R9150 Di2 Rim Brake 11 Speed Groupset is a testament to Shimano’s relentless pursuit of innovation.

With the R9150 Di2 electronic versions, Shimano introduces several groundbreaking features for road cycling enthusiasts.

Whether you prefer integrated power meters, hydraulic disc braking, or Shimano’s synchronized shifting technology, the Dura-Ace groupset has you covered.

Electronic Shifting and Synchronised Shifting Technology:

Electronic Shifting and Synchronised Shifting Technology

One of the standout features of the Dura-Ace R9150 Di2 Groupset is its synchronized shifting technology. Building upon the success of Shimano’s XTR Di2 and XT Di2 mountain bike groupsets, this system allows both derailleurs to be controlled by a single shift lever.

By selecting “Full” or “Semi” Synchro Shift modes, riders can experience seamless gear changes that adapt to their shifting patterns, optimizing efficiency and preserving their rhythm.

Enhanced Ergonomics and Grip

Enhanced Ergonomics and Grip

Shimano has paid meticulous attention to the ergonomics of the Dura-Ace R9150 Di2 Groupset, ensuring a comfortable and intuitive riding experience.

The shifter hoods, both with and without hydraulic internals, offer similar ergonomics, allowing riders to maintain a consistent feel regardless of the configuration.

Furthermore, the shift levers are adjustable, catering to different hand sizes and reach preferences.

Integrated Power Meter:

For those seeking advanced performance tracking, the Dura-Ace R9150 Di2 Groupset offers the option of a Hollowtech II crankset with an integrated power meter (FC-R9100-P).

The power meter’s accuracy is exceptional, providing real-time data on power output, cadence, and even individual leg performance.

Additionally, the power meter retains its accuracy even when changing chainrings, offering versatility without sacrificing precision.

Disc Brake Performance

Wireless Functionality and Customization

With the Dura-Ace R9150 Di2 Groupset, Shimano introduces dedicated hydraulic disc braking to its flagship road groupset for the first time.

These disc brakes deliver enhanced control and confidence, particularly in challenging weather conditions. Not to mention, the Centerlock mounting standard ensures easy installation, while the SM-RT900 rotors provide efficient heat dissipation.

With options for 140mm and 160mm sizes, riders can customize their setup based on their specific needs.

Wireless Functionality and Customization

The best part is that Shimano has embraced wireless connectivity with the Dura-Ace R9150 Di2 Groupset. The Di2 derailleurs are connected via the EW-WU111 wireless unit, enabling an ANT Private connection to third-party devices.

The E-TUBE software, accessible on smartphones and tablets via Bluetooth, allows for system diagnostics, firmware uploads, and the ability to save individual rider profiles.

This convenience eliminates the need for reprogramming the system for every ride or race.

All-New Wheel-sets and Pedals

All-New Wheel-sets and Pedals

Complementing the groupset, Shimano offers three new wheelsets with rim depths of 24mm, 40mm, and 60mm, available in various clincher, tubular, and tubeless configurations.

These wheels provide versatility and performance to match the Dura-Ace groupset. Also, the carbon PD-R9100 SPD-SL pedals offer a lightweight and efficient pedal option, further elevating the overall riding experience.

Made for cyclists of all level

Made for cyclists of all level

In real-life scenarios, the Dura-Ace R9150 Di2 Groupset excels in delivering precise and smooth gear changes, enabling riders to maintain their rhythm effortlessly.

For the target audience, which includes professional cyclists and dedicated enthusiasts, the Dura-Ace R9150 Di2 Groupset meets the highest standards of performance and reliability.

Its customization options and wireless connectivity cater to the demands of professional racers who require quick and precise adjustments.

Simultaneously, its user-friendly features and improved ergonomics ensure a comfortable and intuitive experience for cyclists of all levels.


Q. Is the Shimano Dura-Ace R9150 Di2 Groupset difficult to maintain?

A: The Dura-Ace R9150 Di2 Groupset is designed to be relatively low-maintenance. The electronic shifting system eliminates the need for cable adjustments, ensuring consistent and precise shifting performance over time.

Q. Can I use the Dura-Ace R9150 Di2 Groupset with other brands of components?

 While the Dura-Ace R9150 Di2 Groupset is primarily designed for use with Shimano components, it is generally compatible with other brands’ components as well.

Q. Does the Dura-Ace R9150 Di2 Groupset require a specific type of battery?

The Dura-Ace R9150 Di2 Groupset utilizes a rechargeable lithium-ion battery. The specific model is the BT-DN110 battery, which is designed to be integrated into the bike frame or mounted externally using an adapter.


The Shimano Dura-Ace R9150 Di2 Rim Brake 11 Speed Groupset represents the epitome of Shimano’s engineering excellence.

With its advanced features, seamless shifting, precise power meter, and hydraulic disc braking, this groupset redefines what is possible in road cycling.

Whether you’re a competitive racer or an avid enthusiast, the Dura-Ace R9150 Di2 Groupset offers unparalleled performance and a riding experience that is truly unparalleled.

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