FASTACE P329A0799-0054 Extreme Ex Rear Coil Shock Mtb Bike Rebound 550 Lbs/in Compression

( Brand: Fastace ), ( Manufacturer Part Number: P329A0799-0054 ), ( Part Type: Coil Bike ), ( Color: Black ), ( Size: See Description ), ( Style: Classic ), ( Shock Type: Rear Shock ), ( Department: Unisex Adults ), ( Spring Type: Coil ), ( Spring Rate: 550 Lb/in ), ( Compatible Bike Type: Mountain Bike, Electric Bike, Downhill Bike )

Review FASTACE Extreme Ex Rear Coil Shock 550 Lbs/in Mtb E bike Rebound Compression

The **FastAce P329A0799-0054 Extreme EX Rear Coil Shock** is a high-performance, precision-engineered suspension component designed to deliver unmatched durability, responsiveness, and control for demanding mountain biking and e-bike applications. Built to withstand the rigors of aggressive off-road riding, this coil-over shock features a robust **550 lbs/in (97.5 N/mm) spring rate**, making it ideal for riders seeking a firm yet compliant ride tailored to heavy-duty trails, downhill descents, or high-speed e-bike commuting. The **Extreme EX series** incorporates FastAce s proprietary **dual-tube design**, combining a sealed, high-pressure nitrogen-charged chamber with a robust outer casing to ensure consistent performance, minimal oil leakage, and extended service life. The shock s **rebound and compression damping** are meticulously tuned for e-bike applications, where the added weight and torque of electric assist systems demand superior stability and energy absorption. Constructed from **high-grade aluminum and reinforced steel components**, this shock is engineered to handle the increased stress of e-bike suspension travel, providing a smoother, more predictable ride while maintaining structural integrity under extreme loads. Whether tackling rough singletrack, aggressive descents, or long-distance e-bike adventures, the P329A0799-0054 delivers a balance of stiffness and compliance, allowing riders to push their limits with confidence. Its **adjustable rebound and compression damping** ensures customizable tuning for varying terrain and rider preferences, while the **coil-over design** eliminates the need for frequent oil changes, making it a low-maintenance yet high-performance choice for serious off-road enthusiasts. Built to last, this shock is a testament to FastAce s commitment to innovation and reliability, offering a premium solution for those who demand nothing less than excellence in mountain biking and e-bike suspension technology.

### **Pros and Cons of buying a FastAce P329A0799-0054 Extreme EX Rear Coil Shock (550 lbs/in, MTB E-Bike, Rebound/Compression Adjustable)**

1. **High Load Capacity (550 lbs/in)** Suitable for heavy riders or aggressive e-bike setups, reducing sag and improving stability.

2. **Adjustable Rebound and Compression** Allows fine-tuning for different riding styles (trail, downhill, or commuting), enhancing control and comfort.

3. **Coil Spring Design** Provides better damping consistency over rough terrain compared to air shocks, reducing bottoming out and improving ride quality.

4. **Durability** Built for demanding use, including e-bike weight and torque, with reinforced components to handle frequent cycling.

5. **Compatibility with E-Bikes** Designed to handle the extra weight and power of electric bicycles, reducing stress on the frame and suspension.

6. **Long-Lasting Performance** High-quality materials and construction suggest a longer lifespan than budget shocks.

7. **Adjustable Sag** Helps optimize ride height for personal preference and terrain, improving efficiency and handling.

8. **Brand Reputation** FastAce is a well-known manufacturer in the suspension industry, offering reliable after-sales support and parts availability.

1. **Higher Cost** Compared to basic air shocks or entry-level coil shocks, this is a premium product, which may not be justified for casual riders.

2. **Maintenance Requirements** Coil shocks require periodic lubrication, seal checks, and potential spring adjustments, unlike air shocks that can be adjusted on the go.

3. **Weight** Coil shocks are heavier than air shocks, which could slightly reduce pedal efficiency or maneuverability on lightweight e-bikes.

4. **Limited Adjustability Range** While adjustable, the rebound/compression settings may not cover every possible riding condition as extensively as some high-end air shocks.

5. **Installation Complexity** Requires proper alignment and setup, which may necessitate professional help if the rider lacks mechanical experience.

6. **Potential for Sagging Over Time** Coil springs can lose tension gradually, requiring occasional retightening or replacement.

7. **Less Common in Aftermarket** Finding replacement parts or compatible upgrades may be harder than for more widely used shocks.

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### **Conclusion and Recommendation**

The **FastAce P329A0799-0054 Extreme EX rear coil shock** is an excellent choice for riders who prioritize **durability, adjustability, and performance** in demanding conditions, particularly on e-bikes. Its **high load capacity, coil spring reliability, and fine-tuned damping** make it ideal for **aggressive trail riding, downhill, or heavy-duty commuting**. However, it is **not necessary** for casual riders or those on a tight budget, as cheaper alternatives (e.g., air shocks or basic coil shocks) may suffice.

- **Buy if:** You ride an e-bike heavily, prioritize long-term durability, and want precise adjustability for varied terrains. The investment is justified for serious riders who demand performance.

- **Skip if:** You are a casual rider, prefer ease of use (air shocks are simpler to adjust), or are working with a limited budget. In such cases, consider a **lighter, more affordable shock** that still meets your needs.

For most **e-bike enthusiasts who push their bikes hard**, this shock is a **strong, reliable upgrade** worth the cost. For others, weigh the trade-offs carefully against your riding habits and budget.

Details:

Shows signs of normal use including scuffs, scratches, and minor paint chips on the body spring. Decals are intact with some light wear. Please review all photos for a detailed assessment of condition. Main shaft appears clean and in good condition.

Used Fastace rear coil shock absorbed. Brand: Fastace model: Extreme EX MPN: P329A0799-0054 Type: Rear Coil Shock Absorbed Spring Rate: 550 LBS/IN Adjustments: Compression Blue Knob, Rebound Red Reload Color: Black / Silver.

part #: p329a07990054 price

• $89.95

specifications ribicycl:

• brand: Fastace
• mpn: P329a0799-0054
• part type: Coil Bike
• color: Black
• size: See Description
• style: Classic
• shock type: Rear Shock
• department: Unisex Adults
• spring type: Coil
• spring rate: 550 Lb/in
• compatible bike type: Mountain Bike, Electric Bike, Downhill Bike

offer ribicycl:

• options: Ship-to-home
• availability: In Stock
• best offers: True
• started: April 15, 2026
• quantity: 1
• sold: 0

payments ribicycl:

• wallet: Paypal
• other
• credit card: Visa

shipping ribicycl:

• service: USPS Ground Advantage
• cost: $9.81
• carrier: USPS
• transit: 4-10 Days
• type: Calculated
• class: Standard

seller ribicycl:

• city: Katy, Texas
• rating: 99.2%
• # reviews: 1135

returns ribicycl:

• policy: No Returns

general ribicycl:

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

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