Shimano Ultegra R8050 Di2 TT Tri Upgrade Kit Review

Shimano Ultegra R8050 Di2

The Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit is truly a game-changer in terms of enhanced versatility for riders.

This pro-approved electric 11-speed groupset draws inspiration from its sister, the renowned Dura-Ace, ensuring exceptional performance and precision.

With just a click of a button, you can effortlessly change gears, making long-distance rides a breeze. The Ultegra R8050 has been meticulously designed to accommodate wider rims and tires, enhancing its versatility.

Not to mention, with the ergonomically shaped Di2 shifters and improved adjustability, you can expect a seamless and comfortable shifting experience.

In the next section, let’s delve deeper into the remarkable features that make this upgrade kit a must-have for serious cyclists.

Key Features of this upgrade kit

Here’s a table describing the key features of the Shimano Ultegra 8050 Di2 TT/Triathlon Upgrade Kit:

Key FeaturesDescription
Electronic ShiftingSmooth and precise electronic shifting for quick and accurate gear changes
Shift/Brake LeversErgonomically designed shift/brake levers for effortless shifting and braking
Front DerailleurFront derailleur with automatic trim function for optimal chain line and minimal chain rub
Rear DerailleurRear derailleur with Shadow RD technology for improved stability and precise gear changes
CassetteWide range cassette options for customized gear ratios and versatile performance
ChainHigh-quality chain for efficient power transfer and durability
CranksetHollowtech II crankset for increased stiffness and lightweight design
Bottom BracketDurable bottom bracket with advanced sealing for smooth and reliable performance
WiringClean and concealed wiring for a streamlined and aerodynamic setup
Synchronized ShiftSynchronized shift functionality for intuitive and automatic front/rear shifting
Di2 E-Tube TechnologyE-Tube technology for easy customization, firmware updates, and system diagnostics
TT/Triathlon SpecificDesigned specifically for TT and Triathlon bikes with aerodynamic considerations
CompatibilityCompatible with other Ultegra Di2 components and accessories for seamless integration
Recommended UseIdeal for TT and Triathlon applications, providing precise and reliable shifting and braking


The Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit is a powerhouse of features that revolutionize the cycling experience. How? Let’s have a look at the features and specifications to get a grip:

Dual Control Lever

The mechanical brake DUAL CONTROL LEVER is a highlight of this kit. The Ultegra Di2 ST-R8050 STI is a standout component of the Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit. This mechanical brake DUAL CONTROL LEVER offers the perfect blend of exceptional braking performance and Di2 electronic shifting.

With its 2×11-speed functionality, the ST-R8050 STI ensures quick, precise, and effortless shifting, even while wearing thick gloves.

Enhance Controlling

To enhance control. the groupset features an updated button feel and layout, providing riders with maximum control and confidence.

The range of reach adjustment and programmable ST button switch on the hood further enhance the user experience.

Enhance Controlling

Whether tackling challenging terrain or sprinting toward the finish line, the Ultegra Di2 ST-R8050 STI delivers reliable and efficient shifting performance.

A Better Crankset

The SHIMANO ULTEGRA Hollowtech II Road Crankset is designed for optimal power transfer and efficiency. It’s because this crankset features lightweight crank arms, a hollow outer chainring, and a wider gear pitch.

In short, the construction ensures increased clearance on modern road frames, allowing riders to push their limits without restrictions.

Hollowtech II Technology

The Hollowtech II technology provides a balance between stiffness and weight reduction, resulting in a responsive and reliable performance.

When climbing steep gradients or sprinting on flat roads, the ULTEGRA Hollowtech II Road Crankset delivers the power and reliability that serious cyclists demand.

Mechanical and Electronic Integration

The mechanical and electronic integration of the Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit sets it apart from other systems.

Sharing the same DNA as its mechanical counterpart, this kit incorporates 4-arm cranks, 11-speed cassettes, dual-pivot brakes, Sil-tec chain, and 11-speed wheels.

Mechanical and Electronic Integration

However, the key distinction lies in the shifting interface. The Ultegra 8050 (Di2) utilizes an electronic shifting system, eliminating the need for manual cable actuation.

This integration ensures precise and lightning-fast shifting with just a click of a button. Cyclists benefit from the reliability and consistency of electronic shifting, allowing for effortless gear changes and enhanced control on every ride.

Enhanced Ergonomics

The Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit excels in providing enhanced ergonomics, elevating the rider’s control and comfort.

Compared to its predecessor, the Ultegra Di2 (6870), the dual control lever has undergone improvements, offering riders easier access and a refined experience.

The slimmer hoods ensure a secure grip, granting riders more control than ever before.

The shift button’s improved shape enhances tactile feedback, while the enhanced contrast of the surface improves visibility.

These ergonomic enhancements make long rides and quick gear changes a breeze, allowing riders to focus on the road ahead.

Compact and Lightweight Derailleurs

The Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit features compact and lightweight derailleurs that offer exceptional performance without compromising on durability.

Compared to their predecessors, these derailleurs have been meticulously redesigned to reduce weight and improve overall efficiency.

The rear derailleur incorporates an automatic protection system, which retracts the cage in case of a crash, minimizing the risk of damage.

There are two versions available, with the SS version accommodating cassettes up to 28T and the GS version supporting cassettes up to 32T.

This versatility, combined with their sleek and compact design, provides riders with a wide range of gearing options while maintaining a streamlined and efficient setup.

Furthermore, the compact and lightweight design of the derailleurs, along with the automatic protection system, adds an extra layer of reliability and durability to the kit.

Multi Shifting and Adjustable Gear Shift Speed

The Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit offers advanced features like multi-shifting and adjustable gear shift speed, elevating the riding experience to new heights.

With a single press and hold of the shift button, the rear derailleur effortlessly moves up or down the cassette, allowing for swift and precise gear changes.

Moreover, the E-tube platform allows customization of the shifting behavior, enabling two or three gear shifts with a single press.

Multi Shifting and Adjustable Gear Shift Speed

Riders can also adjust the speed of gear shifts to their preference, selecting from five different settings ranging from very slow to very fast.

This level of control and adaptability ensures optimal performance in various riding conditions and personal preferences.

High-Performance Chain

The Shimano CN-HG601-11 chain boasts 116 links and offers precise shifting and improved durability.

The SIL-TEC treatment applied to the inner plate surfaces further enhances its performance.

Compatibility and Flexibility

The Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit is designed to work with most dual-pivot, direct-mount, mini-v, and cantilever brakes, making it suitable for road, cyclocross, and aero TT bikes.

It is also compatible with mechanical disc brakes, providing flexibility for different cycling disciplines.

Real-life scenarios

Where the Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit shines include time trials and triathlons, where every second counts.

The quick and precise shifting, coupled with the ability to shift multiple gears at once, allows athletes to maintain their momentum and optimize their performance.

While the Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit boasts numerous advantages, it’s worth noting that the set does not include brakes, brake cables and housing, hubs, or a bottom bracket.

These additional components need to be considered when planning the installation or upgrade.


Q: Is the Ultegra 8050 Di2 TT Tri Upgrade Kit suitable for triathlon or time trial bikes?

Ans: Yes, the kit is specifically designed for triathlon and time trial bikes, offering aerodynamic advantages and optimized performance in these disciplines.

Q: Can I customize the shifting behavior and speed of the Ultegra 8050 Di2 TT Tri Upgrade Kit?

Ans: Yes, through the E-tube platform, you can customize the shifting behavior, adjust the speed of gear shifts, and even program multi-shift options according to your preferences.

Q: Is the Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit compatible with my current bike?

Ans: The kit is designed to be compatible with most road bikes, but it’s recommended to check your bike’s specifications and compatibility before purchasing.


As you can see, the Shimano Ultegra 8050 Di2 TT Tri Upgrade Kit proves to be an exceptional choice for cyclists seeking top-tier performance and reliability.

It’s seamless electronic shifting, enhanced ergonomics, and compact design showcase its superiority in the market. The kit’s multi-shifting capabilities and adjustable gear shift speed provide customizable options to suit individual preferences.

While the additional components required for installation should be considered, the Ultegra 8050 Di2 TT Tri Upgrade Kit’s overall value, durability, and exceptional user experience make it highly recommended for serious cyclists and enthusiasts looking to elevate their riding performance.

Leave a Comment

Your email address will not be published. Required fields are marked *