SRAM 03T30051263 Rear Derailleur Road Trial Ultra Road/time

( Brand: Sram ), ( Manufacturer Part Number: 03T30051263 ), ( Part Type: Derailleur ), ( Compatible Brand: For Sram ), ( Color: Red ), ( Material: Carbon Fiber, Titanium, Aluminum ), ( Mounting Type: Bolt-on ), ( Number Of Speeds: 10 Speed ), ( Compatible Bike Type: Racing Bike, Road Bike, Time Trial/triathlon Bike ), ( Derailleur Cage Length: Short Cage )

Review SRAM Red Rear Derailleur Speed Road/time-trial Ultra Lightweight

The **SRAM 03T30051263 Rear Derailleur (10-Speed Road/Time-Trial Ultra)** is a high-performance, precision-engineered component designed to deliver unmatched shifting efficiency, durability, and reliability for competitive road and time-trial cyclists. Part of SRAM s cutting-edge **XX1 Ultra** lineup, this derailleur embodies the brand s commitment to optimizing power transfer and reducing rotational weight while maintaining the robustness required for grueling races and demanding training sessions. Built with **carbon fiber components**, including the cage, jockey wheels, and pivot points, this derailleur minimizes inertia and vibration, allowing for smoother, more responsive gear changes even under extreme conditions. The **10-speed compatibility** ensures seamless integration with modern road and time-trial drivetrains, while the **Ultra** designation highlights its ultra-lightweight construction, featuring a **30mm cage** that balances strength with weight savings, making it ideal for riders prioritizing aerodynamics and speed without compromising durability.

The derailleur s **SRAM s proprietary shifting technology** ensures rapid, precise indexing with minimal chain slap, thanks to its **low-friction pulley system** and **optimized spring tension**. The **dual-bore lower pulley** reduces chain tension fluctuations, improving chain longevity and shifting consistency, particularly in aggressive climbing or high-speed descents. The **anodized aluminum pivot points** are treated with SRAM s **Duratec** coating, providing corrosion resistance and extended wear life, even in harsh weather or competitive environments where maintenance may be limited. The **quick-release skewer-compatible dropout** ensures easy installation and removal, while the **SRAM s proprietary shift lever compatibility** guarantees seamless integration with the rest of the XX1 Ultra drivetrain, including the **XX1 10-speed crankset and cassette**, for a cohesive, high-performance system.

Designed with **aerodynamic efficiency** in mind, the derailleur s sleek, streamlined profile reduces drag while maintaining structural integrity. The **carbon cage** not only reduces weight but also dampens vibrations, enhancing rider comfort during long, high-speed efforts. The **adjustable limit screws** allow for fine-tuning of shift range, accommodating various cassette setups and rider preferences, whether for aggressive climbing or efficient sprinting. Built to withstand the rigors of professional racing, this derailleur is **100% compatible** with SRAM s **XX1 10-speed road and time-trial components**, making it a standout choice for riders seeking the pinnacle of shifting performance without unnecessary bulk. Whether tackling a grueling time trial or pushing the limits in a road race, the **SRAM 03T30051263 Rear Derailleur** delivers the precision, reliability, and efficiency demanded by elite cyclists.

The SRAM 03T30051263 rear derailleur is a high-end component designed for road and time-trial bikes, specifically part of the **Ultra** series, which is known for its lightweight construction and performance. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Ultra-Lightweight Design**

The SRAM Ultra series is engineered to minimize weight without sacrificing durability. This derailleur is significantly lighter than many standard road derailleurs, which can improve acceleration and climbing efficiency, especially for competitive riders or those prioritizing weight savings.

2. **High Performance and Precision**

SRAM s Ultra derailleurs are built with high-quality materials and precision engineering, ensuring smooth shifting even under heavy loads or in extreme conditions. The design reduces friction and wear, which can extend the lifespan of the drivetrain.

3. **Durability and Reliability**

While lightweight, the Ultra series is not at the expense of strength. SRAM uses advanced alloys and heat treatment to maintain rigidity and resistance to fatigue, making it suitable for demanding riding conditions, including racing and long-distance rides.

4. **Compatibility with High-End Components**

This derailleur is designed to work seamlessly with other SRAM Ultra components (e.g., cranks, cassettes, and shifters), creating a cohesive and optimized system. It also pairs well with other high-end brands like Shimano Dura-Ace or Campagnolo, though compatibility may vary slightly depending on the specific model.

5. **Aerodynamic Considerations**

For time-trial and triathlon applications, the Ultra series is often designed with aerodynamic efficiency in mind. While this specific derailleur may not have overt aerodynamic features like aero covers, its lightweight nature contributes to overall bike aerodynamics.

6. **Long-Term Value**

SRAM s Ultra components are built to last, and their reputation for durability means they can outperform cheaper alternatives over time. This can be cost-effective for serious riders who invest in high-quality gear.

7. **Minimal Maintenance**

Due to its precision engineering and high-quality bearings, the Ultra derailleur typically requires less frequent maintenance compared to lower-end models. This can save time and money in the long run.

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### **Cons**

1. **High Cost**

The SRAM Ultra series is positioned as a premium offering, and this derailleur is no exception. It is significantly more expensive than mid-range or entry-level derailleurs from SRAM or competitors like Shimano or Campagnolo. The price may not justify the upgrade for casual riders or those on a tight budget.

2. **Limited Availability and Replacement Parts**

High-end components like this one may have limited availability for replacement parts or servicing, especially in regions with fewer SRAM-certified mechanics. This could pose challenges if the derailleur fails or requires maintenance.

3. **Overkill for Casual Riders**

If you are not a competitive cyclist or do not prioritize weight savings, the performance benefits of this derailleur may not be noticeable. For recreational riders, a mid-range derailleur (e.g., SRAM Force or Rival) would likely suffice without the added cost.

4. **Potential for Overuse**

The lightweight nature of the Ultra series means it may be more prone to damage if subjected to rough terrain, aggressive riding, or poor maintenance. For example, hitting a curb or riding on gravel could more easily bend or damage the derailleur compared to a heavier, more robust model.

5. **Compatibility Quirks**

While generally compatible with other SRAM Ultra components, there may be subtle issues when mixing brands or models. For example, some riders report minor shifting inconsistencies when pairing SRAM Ultra derailleurs with Shimano or Campagnolo cassettes, though this is not universal.

6. **Resale Value**

High-end components like this one may depreciate quickly, especially if newer or improved models are released. While they retain value better than budget parts, the resale value may not fully offset the initial cost for all riders.

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### **Conclusion**

The SRAM 03T30051263 rear derailleur is an excellent choice for **serious cyclists, racers, or triathletes** who prioritize weight savings, precision shifting, and long-term durability. Its lightweight construction and high-performance characteristics make it ideal for those who demand the best from their drivetrain. However, the significant cost and potential overkill for casual riders are major drawbacks.

For **competitive riders** or those building a high-end system, this derailleur is a worthwhile investment. For **recreational riders, commuters, or those on a budget**, a mid-range or entry-level derailleur would offer similar performance at a fraction of the cost.

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### **Recommendation**

- You are a competitive cyclist, racer, or triathlete.

- You are building a high-end drivetrain and want the best performance and weight savings.

- You prioritize durability and long-term reliability in your components.

- You are willing to invest in a premium product that will enhance your riding experience significantly.

- You are a casual rider or do not ride frequently.

- You are on a tight budget and can achieve similar performance with a mid-range derailleur.

- You frequently ride on rough terrain or in conditions where durability might be compromised.

- You are unsure about the long-term commitment to high-end components.

If you decide to proceed, pair it with other SRAM Ultra components for a fully optimized system. Regular maintenance will also ensure its longevity and performance.

Details:

Everything works as it should. SRAM red 10 speed high performance road rear derailleur. Bearings are still incredible. There is some minor cosmetic damage on the back of parallelogram.

Lightly used.

part #: 03t30051263 prices

• $74.99-$89.99

specifications ribicycl:

• brand: Sram
• mpn: 03t30051263
• part type: Derailleur
• compatible brand: For Sram
• color: Red
• material: Carbon Fiber, Titanium, Aluminum
• mounting type: Bolt-on
• number of speeds: 10 Speed
• compatible bike type: Racing Bike, Road Bike, Time Trial/triathlon Bike
• derailleur cage length: Short Cage

offer ribicycl:

• options: Ship-to-home
• started: March 25, 2026
• availability: In Stock
• sold: 0
• quantity: 1

returns ribicycl:

• policy: No Returns

payments ribicycl:

• credit card: Mastercard
• wallet: Google-pay
• other

general ribicycl:

• condition: Used
• Cycling > Bicycle Components Parts > Rear Derailleurs

shipping ribicycl:

• class: Standard
• cost: $6.01
• type: Fixed
• carrier: USPS
• transit: 3-9 Days
• service: USPS Ground Advantage

seller ribicycl:

• rating: 100.0%
• city: Cordova, Tennessee
• # reviews: 20

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