SHIMANO ST-6770-R Ultegra Right Rear Rim Brake Shifter Right/rear DI2

( Brand: Shimano ), ( Manufacturer Part Number: ST-6770-R ), ( Color: Black ), ( Compatible Bike Type: Road Bike ), ( Material: Composite ), ( Number Of Speeds: 10/11 Speed ), ( Part Type: Brake/shifter Combo Right ), ( Set Includes: Shifter ), ( Shifter Style: Electronic )

Review SHIMANO Ultegra Right/rear Rim Brake Di2 Shifter Excellent

The **Shimano ST-6770-R Ultegra Right/Rear Rim Brake Di2 Shifter** represents the pinnacle of precision and performance in electronic shifting technology, meticulously engineered for discerning cyclists who demand seamless, responsive, and ultra-reliable gear changes. Designed as a key component of Shimano s Di2 electronic shifting system, this shifter embodies the brand s commitment to innovation, durability, and ergonomic excellence, making it an ideal choice for road cyclists seeking a refined riding experience. The ST-6770-R is built around a robust, lightweight aluminum construction, ensuring a balance of strength and agility that complements the demands of both aggressive climbs and high-speed descents. Its sleek, aerodynamic profile minimizes wind resistance while maximizing control, allowing riders to maintain a natural, efficient hand position throughout their ride.

At the heart of this shifter lies Shimano s advanced **Di2 electronic actuation system**, which eliminates the need for traditional cable pulls, replacing them with instantaneous, cable-free shifting via wireless communication between the shifter and the rear derailleur. This system not only enhances shifting smoothness but also reduces maintenance requirements, as there are no cables to fray, stretch, or corrode over time. The ST-6770-R features a **right-hand side (R) design**, specifically tailored for rear placement on the handlebar, where it seamlessly integrates with the left-hand side (L) front derailleur shifter to create a fully synchronized shifting experience. The shifter s **dual-lever design** provides intuitive control, with dedicated front and rear shift buttons that allow for precise, independent adjustments to the front chainring and rear cassette, ensuring optimal gear selection for every terrain and riding condition.

Ergonomics play a crucial role in the ST-6770-R s design, with a **contoured grip** that offers a secure, fatigue-resistant hold, even during prolonged rides. The shifter s **adjustable hoods** can be positioned to accommodate various hand sizes and preferences, allowing riders to customize their grip for maximum comfort and control. Additionally, the **integrated Di2 battery connector** ensures easy access for charging or swapping batteries, while the **durable rubberized pads** on the shift buttons provide tactile feedback, confirming each gear change with a satisfying click. The shifter s **sealed, weather-resistant construction** further enhances its reliability, protecting internal components from dust, moisture, and debris, which is essential for maintaining consistent performance in all riding conditions.

For those who prioritize both aesthetics and functionality, the ST-6770-R s **sleek, matte black finish** blends seamlessly with modern frame designs, while its **precision-machined components** reflect Shimano s dedication to quality craftsmanship. Whether paired with a lightweight carbon frame or a sturdy aluminum rig, this shifter elevates the riding experience by delivering **sub-10-millisecond response times**, ensuring that gear changes are executed with the speed and accuracy of a mechanical system, but without the friction or wear associated with traditional drivetrains. The ST-6770-R is not merely a shifter; it is a testament to Shimano s engineering prowess, offering cyclists a blend of cutting-edge technology, ergonomic brilliance, and uncompromising performance that sets the standard for electronic shifting in road cycling.

The **Shimano ST-R6770-R Ultegra Right/Rear Rim Brake Di2 Shifter** is a high-end component designed for road cycling, offering a blend of performance, precision, and integration with Shimano s Di2 electronic shifting system. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Di2 Electronic Shifting**

- The Di2 system provides ultra-precise, consistent shifting with minimal lag, improving ride feel and efficiency compared to mechanical shifting. This is particularly beneficial in fast-paced or technical riding conditions.

- Wireless operation eliminates the need for cables, reducing weight and complexity while improving reliability. The system is also less prone to weather-related issues (e.g., mud, rain) that can affect mechanical derailleurs.

- The ability to program shift maps and adjust sensitivity via the Di2 Tool or Shimano EP8 app enhances customization for different riding styles or terrains.

2. **Ultegra Group Performance**

- As part of Shimano s Ultegra lineup, these shifters are built to high standards with durable materials, including aluminum frames and high-quality bearings. Ultegra components strike a balance between performance and value, offering near-Grade components at a more accessible price point.

- The shifters integrate seamlessly with other Ultegra parts (e.g., derailleurs, cranks, wheels), ensuring consistent performance across the drivetrain. This compatibility is ideal for riders who prefer a cohesive system.

3. **Ergonomic and Adjustable Design**

- The ST-R6770-R features an ergonomic hood design that reduces hand fatigue during long rides. The adjustable lever position allows riders to customize the grip for comfort, accommodating different hand sizes or preferences.

- The right shifter includes a brake lever with a smooth, progressive feel, which is crucial for efficient braking without sacrificing control. The lever design minimizes "sponginess," a common complaint with some rim brake levers.

4. **Durability and Reliability**

- Shimano s Di2 system is known for its longevity, with many riders reporting reliable performance over thousands of miles. The lack of cables also reduces wear points that can fail in mechanical systems.

- Ultegra components are built to withstand regular use, with robust internals and corrosion-resistant coatings. The shifters are less likely to suffer from common issues like cable stretch or derailleur misalignment.

5. **Compatibility with Rim Brakes**

- While rim brakes are less common in modern road cycling (due to the rise of disc brakes), the ST-R6770-R is a solid choice for riders who prefer or require rim brakes. The integration with Di2 ensures that the shifting and braking feel cohesive and responsive.

- Rim brakes are often lighter than hydraulic disc brakes, which can be advantageous for climbers or riders prioritizing weight savings in the wheelset.

6. **Resale Value**

- Ultegra Di2 components hold their value well compared to lower-tier electronic systems or mechanical parts. If you plan to upgrade or sell your bike in the future, these shifters will retain a significant portion of their original value.

7. **Integration with Shimano s Ecosystem**

- The Di2 system can be expanded with additional controllers (e.g., for front derailleurs, gear position sensors) or integrated with other Shimano products like the EP8 app for performance tracking and tuning.

- Future-proofing is a consideration; Shimano continues to support and update its Di2 technology, ensuring compatibility with newer components as they are released.

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### **Cons**

1. **Cost**

- The ST-R6770-R Ultegra Di2 shifters are significantly more expensive than mechanical alternatives or even entry-level electronic systems (e.g., Shimano Deore Di2). The price reflects the advanced technology, but it may be a barrier for budget-conscious riders.

- While Ultegra is more affordable than Shimano s top-tier Grade components, the cost of Di2 electronics adds up quickly, especially when paired with other Di2 parts like derailleurs or cranks.

2. **Weight**

- Di2 systems are heavier than their mechanical counterparts due to the electronics, batteries, and wiring. While the weight difference is subtle, it may be noticeable in climbs or when carrying the bike.

- The battery pack (not included with the shifters) adds additional weight, though it is relatively small and can be mounted discreetly on the frame or fork.

3. **Battery Dependency**

- Di2 requires a battery (typically a 14.8V lithium-ion) to power the shifting. While the battery lasts for hundreds of miles on a single charge, it adds a layer of maintenance:

- You must periodically check and replace the battery (Shimano batteries typically last 2 3 years or 1,000 2,000 miles, depending on usage).

- Charging the battery requires a Di2 charger, which is an additional cost.

- In extreme temperatures (very cold or hot), battery performance can degrade, leading to shorter range or slower charging times.

4. **Limited Rim Brake Support**

- Rim brakes are less common in modern road cycling, and many riders are transitioning to disc brakes for better stopping power, especially in wet conditions or on rough surfaces. While the ST-R6770-R works well with rim brakes, this choice may limit future flexibility if you decide to switch to disc brakes later.

- Disc brake levers (e.g., Shimano ST-R8000 or ST-R9100) are not compatible with this shifter, so a full upgrade would be required.

5. **Learning Curve**

- Di2 shifting requires some adjustment for riders used to mechanical systems. The electronic nature of the system means there s no "feel" of cable tension or derailleur movement; instead, shifts are instant and silent, which can feel unnatural at first.

- Programming shift maps and adjusting sensitivity may take time to master, though Shimano provides tools and guides to simplify the process.

6. **Potential for Electronic Issues**

- While rare, Di2 systems can experience electronic glitches, such as shifting errors, delayed responses, or connectivity issues with the battery or derailleurs. These issues are typically fixable with a reset or firmware update but can be frustrating if they occur mid-ride.

- The system s complexity means that repairs or replacements may require specialized knowledge or Shimano service centers, adding to maintenance costs.

7. **Environmental Sensitivity**

- Di2 electronics are sensitive to extreme conditions. Heavy rain, dust, or moisture can potentially interfere with the system s performance, though Shimano s sealing is generally robust. Riders in harsh environments may need to take extra precautions (e.g., avoiding prolonged exposure to water).

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### **Conclusion**

The **Shimano ST-R6770-R Ultegra Di2 Rim Brake Shifter** is an excellent choice for riders who prioritize precision, integration, and electronic shifting without the premium price tag of Shimano s top-tier components. It offers a significant upgrade over mechanical systems in terms of consistency, customization, and ride feel, making it ideal for serious cyclists who want a high-performance drivetrain.

- If you value **electronics, seamless integration with Ultegra components, and rim brake compatibility**, this is a strong choice.

- If you **prioritize weight savings, simplicity, or are on a tighter budget**, mechanical shifters or entry-level electronic systems (e.g., Shimano Deore Di2) may be more suitable.

- If you plan to **upgrade to disc brakes in the future**, consider investing in a disc brake-compatible Di2 shifter now to avoid a full replacement later.

- Already own or plan to build a Shimano Ultegra drivetrain.

- Ride in varied conditions where precise, reliable shifting is advantageous.

- Are willing to invest in the Di2 ecosystem for long-term performance and customization.

For riders who are unsure about electronic shifting or prefer the simplicity of mechanical systems, it may be worth testing a Di2 setup on a used bike or through a demo before committing.

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### **Recommendation**

- You are building or upgrading a Shimano Ultegra road bike and want electronic shifting for improved performance and consistency.

- You prefer rim brakes and do not plan to switch to disc brakes in the near future.

- You are comfortable with the additional cost and maintenance of a Di2 system, including battery care and potential programming.

- You value the ergonomic design, precise shifting, and integration with other Ultegra components.

- You are on a tight budget and mechanical shifting meets your needs.

- You plan to switch to disc brakes soon, in which case a disc brake-compatible Di2 shifter (e.g., ST-R8000) would be more future-proof.

- You are new to electronic shifting and want to test the technology before fully committing.

For most dedicated road cyclists who appreciate Shimano s Ultegra lineup and the benefits of Di2, the ST-R6770-R is a **highly recommended upgrade** that enhances both the riding experience and the bike s overall performance.

Details:

Weighing approximately 160 grams, it offers a notable weight reduction compared to traditional mechanical levers, improving overall bike performance without sacrificing durability. Hood feels nearly new. #Road #11 Speed #Rim Brake #Di2 #Electronic Shifting The Shimano Ultegra ST-6770-R is a right-hand electronic brake and shifter combo lever designed for road bikes using Shimano Di2 shifting system. Browse the selections above or view items below.

N/A Used Not new; definitely used; working, but only evaluated at a generic level. Hood has a ton of life left. Shimano Ultegra ST-6770-R Right/Rear Rim Brake Di2 Shifter EXCELLENT In very impressive condition for its age, only showing the lightest signs of past use. We currently have the following examples of this item in stock.

We evaluate each component based on the factors that matter most for part type. It is constructed from a durable blend of plastic and aluminum with black finish, integrating smooth precise electronic shifting buttons alongside ergonomic brake lever design. Detailed s: Every product is accompanied by an individual outlining its unique features, specifications, and any noted imperfections. Updated to latest firmware.

Shimano Ultegra ST-6770-R Right/Rear Rim Brake Di2 Shifter EXCELLENT > Equip your training with Would've today.

part #: st6770 prices

• $49.99-$114.99

specifications ribicycl:

• brand: Shimano
• mpn: St-6770-r
• color: Black
• compatible bike type: Road Bike
• material: Composite
• number of speeds: 10/11 Speed
• part type: Brake/shifter Combo Right
• set includes: Shifter
• shifter style: Electronic

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• other
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• credit card: Visa

offer ribicycl:

• sold: 0
• options: Ship-to-home
• quantity: 1
• availability: In Stock
• started: April 22, 2026

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seller ribicycl:

• city: Saint Petersburg, Florida
• rating: 100.0%
• # reviews: 805

general ribicycl:

• Cycling > Bicycle Components Parts > Shifters
• condition: Used

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• paid by: Seller
• policy: Returns Accepted
• method: Money back
• time: 30 Days

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