ROCKSHOX 00.4118.357.015 Deluxe Ultimate Rct Rear Shock Body 205X50 Shaft Eyelet Trunnion

( Brand: Rockshox ), ( Shock Type: Air Shock ), ( Eye To Eye Measurement: 8.5 In ), ( Color: Black ), ( Compatible Bike Type: Mountain Bike ), ( Material: Aluminum ), ( Set Includes: Rear Shock ), ( Part Type: Rear Shocks ), ( UPC: 004118357015 )

Review ROCKSHOX Deluxe Ultimate Rct Rear Shock 205x50 Shaft Eyelet Trunnion Body

The **RockShox 00.4118.357.015 Deluxe Ultimate RCT Rear Shock** represents the pinnacle of modern mountain biking suspension technology, engineered to deliver unmatched performance, durability, and adaptability for the most demanding riders and terrain. This high-end rear shock is a cornerstone of RockShox s legendary **Deluxe Ultimate** line, a series renowned for its precision engineering, superior damping, and seamless integration with the latest frame and fork technologies. At its core, this shock features a **205mm travel** stroke, a length that strikes an ideal balance between control and efficiency, making it perfect for enduro, downhill, and aggressive trail riding where both absorption and responsiveness are critical. The **50mm shaft diameter** ensures robust rigidity and minimal flex, while the **eyelet trunnion body** design enhances durability and allows for a more compact, streamlined build, reducing weight without compromising strength.

The **RCT (Remote Control Technology)** system embedded within this shock is a game-changer, offering riders the ability to fine-tune damping settings on the fly with the push of a button. This advanced system allows for independent adjustments to **compression damping** (both low-speed and high-speed) and **rebound**, enabling precise tuning for varying terrain conditions whether it s the jarring impacts of rocky descents or the subtle adjustments needed for technical climbs. The **Deluxe Ultimate** platform further elevates this experience with **adaptive damping**, which dynamically adjusts stiffness based on load and speed, ensuring optimal performance across a wide range of scenarios. This level of customization is particularly valuable for riders who demand consistency and confidence in their bike s handling, regardless of the conditions.

Under the hood, the shock is built with RockShox s proprietary **Deluxe Ultimate** components, including a **high-performance piston and valve system** that delivers smooth, linear damping with minimal effort. The **air-spring design** allows for effortless adjustments to preload via the included **air screw**, enabling riders to fine-tune sag and stiffness to match their weight, riding style, and personal preference. The **sealed cartridge system** ensures long-term reliability, protecting internal components from dirt and debris, while the **durable polymer housing** resists wear and tear, even under the most extreme conditions. The **trunnion body** not only contributes to a cleaner, more streamlined look but also improves the shock s integration with the frame, reducing parasitic motion and enhancing overall efficiency.

For riders who push the limits of their bikes, the **Deluxe Ultimate RCT** is also equipped with **RockShox s proprietary rebound damping**, which can be adjusted independently to fine-tune the shock s responsiveness. This feature is particularly useful for riders who prefer a quicker rebound for faster pedaling efficiency or a slower rebound for better control on technical descents. The shock s **compatibility with RockShox s AfterShock app** further extends its functionality, allowing riders to log and analyze their performance, adjust settings remotely, and even receive personalized tuning recommendations based on their riding data. This blend of cutting-edge technology and user-centric design makes the **Deluxe Ultimate RCT** not just a suspension component, but a performance-enhancing tool that adapts to the rider s needs.

In summary, the **RockShox 00.4118.357.015 Deluxe Ultimate RCT Rear Shock** is a masterclass in suspension engineering, combining **205mm of travel**, **adaptive damping**, and **RCT technology** to deliver an unparalleled riding experience. Whether tackling steep, technical climbs or carving through technical descents, this shock provides the precision, control, and durability that serious riders demand. Built to last and optimized for performance, it s the ideal choice for those who refuse to compromise on quality and want the best possible suspension for their high-performance mountain bike.

The **RockShox 00.4118.357.015 Deluxe Ultimate RCT** is a high-end rear shock designed for demanding off-road and downhill mountain biking. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Superior Performance in Extreme Conditions**

- The Deluxe Ultimate RCT is engineered for aggressive riding, including downhill, freeride, and extreme trail conditions. Its robust construction and advanced damping technology provide exceptional control in rough terrain, high-speed descents, and heavy impacts.

2. **High-Quality Materials and Build**

- The shock features a **trunnion body** (a reinforced pivot point) and a **shaft eyelet** design, which enhances durability and reduces flex under extreme loads. The use of high-grade aluminum and precision machining ensures longevity even under heavy abuse.

3. **Adjustable Damping and Compression**

- The RCT (Remote Control Technology) allows for precise adjustments to rebound and compression damping via a remote control, which is mounted on the handlebars. This feature enables riders to fine-tune the shock s response to their weight, riding style, and terrain without stopping.

- The **Deluxe Ultimate** variant includes additional damping modes (e.g., "Ultimate" mode for aggressive riding) that further customize the shock s behavior.

4. **Durability and Reliability**

- RockShox is known for building shocks that can withstand years of heavy use. The 00.4118.357.015 model, in particular, is built to last, with reinforced internals and a robust seal system that resists contamination from dirt and debris.

5. **Compatibility with High-End Bikes**

- This shock is designed to fit premium mountain bikes, particularly those built for downhill or freeride disciplines. It pairs well with high-quality frames and forks, ensuring a cohesive riding experience.

6. **Remote Control Convenience**

- The RCT system eliminates the need to reach down to adjust the shock, which is a significant advantage during fast descents or technical sections where quick adjustments are critical.

7. **Wider Travel and Performance**

- With **205mm of travel**, this shock is well-suited for bikes that require substantial suspension travel to handle large jumps, drops, and aggressive terrain.

---

### **Cons**

1. **High Cost**

- As a premium shock, the 00.4118.357.015 Deluxe Ultimate RCT is significantly more expensive than mid-range or entry-level shocks. The price reflects its advanced features, but it may be prohibitive for casual riders or those on a tight budget.

2. **Complexity and Maintenance**

- High-end shocks like this one require more frequent maintenance than basic models. The RCT system, while convenient, can be more prone to issues (e.g., remote control failures, wiring problems) compared to simpler shocks. Riders may need to invest in regular servicing to keep it performing optimally.

3. **Overkill for Mild or Cross-Country Use**

- If you primarily ride cross-country, trail, or mild downhill terrain, the Deluxe Ultimate RCT may offer more features than you need. A lighter, simpler shock (e.g., RockShox Deluxe or SID) could suffice and save money without sacrificing performance for your intended use.

4. **Weight**

- Like most high-performance shocks, this model is heavier than entry-level options. The added weight may not be noticeable on the bike, but it could be a consideration if you prioritize minimal weight in your setup.

5. **Learning Curve for Adjustments**

- The RCT system and multiple damping modes require some time to master. New riders or those unfamiliar with shock tuning may find it overwhelming or confusing to optimize the settings for their riding style.

6. **Potential for Overuse Damage**

- While the shock is built to be durable, aggressive riding (e.g., constant high-speed jumps or extreme terrain) can still lead to wear over time. The trunnion and shaft eyelet design, while strong, are not indestructible and may require replacement parts if damaged.

---

### **Conclusion**

The **RockShox 00.4118.357.015 Deluxe Ultimate RCT** is one of the best rear shocks available for extreme off-road and downhill riding. Its standout features such as the trunnion body, shaft eyelet design, RCT remote control, and aggressive damping modes make it an excellent choice for riders who demand the utmost performance in demanding conditions. However, its high cost, complexity, and the need for regular maintenance may not justify the investment for casual or cross-country riders.

If you ride primarily on technical downhill trails, perform frequent jumps, or push your bike to its limits, this shock will significantly enhance your riding experience. For riders who mostly tackle mild trails or prefer a simpler setup, a more affordable or lighter shock may be a better fit.

---

### **Recommendation**

- You ride aggressively on downhill, freeride, or extreme trail terrain.

- You prioritize performance, durability, and customization over cost.

- You are comfortable with the higher maintenance requirements and potential complexity of tuning.

- Your bike s frame and fork are high-end, and you want a cohesive, premium suspension setup.

- You primarily ride cross-country, trail, or mild downhill and don t need the advanced features.

- You are on a tight budget and can achieve similar performance with a more affordable shock (e.g., RockShox Deluxe or Fox DHX).

- You lack experience with shock tuning or are unwilling to invest in regular maintenance.

- You prefer a lighter or simpler shock for your riding style.

For most downhill and freeride riders, the **RockShox 00.4118.357.015 Deluxe Ultimate RCT** is a worthwhile investment. However, always weigh your riding needs, budget, and long-term commitment to maintenance before making a purchase.

Details:

Reason it was removed is that I had a crack develop in the frame. Not crash related. This came off my Trek Powerful, its works well but could probably use a service. Bike had 1200 miles when I took it off.

part #: 004118357015 prices

• $152.50-$366.61

specifications ribicycl:

• brand: Rockshox
• shock type: Air Shock
• eye to eye measurement: 8.5 In
• color: Black
• compatible bike type: Mountain Bike
• material: Aluminum
• set includes: Rear Shock
• part type: Rear Shocks
• upc: 004118357015

general ribicycl:

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

returns ribicycl:

• policy: No Returns

payments ribicycl:

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

seller ribicycl:

• rating: 100.0%
• # reviews: 506
• city: Landisville, Pennsylvania

offer ribicycl:

• best offers: True
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• sold: 0
• started: May 11, 2026

shipping ribicycl:

• transit: 4-10 Days
• class: Standard
• service: USPS Ground Advantage
• type: Calculated
• carrier: USPS
• cost: $9.35

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