FOX 803-04-144 Steel Rear Shock Coil Spring 821973501710 400 Lb. 2.8
( Brand: Fox ), ( Manufacturer Part Number: 803-04-144 ), ( Part Type: Coil ), ( Set Includes: Coil Spring ), ( Shock Type: Coil Shock ), ( Unit Type: Lb ), ( UPC: 821973501710 )
Review FOX Steel Rear Shock Coil Spring 400 Lb. 2.8
The **Fox 803-04-144 Steel Rear Shock Coil Spring** is a high-performance, precision-engineered component designed to elevate the handling, comfort, and durability of modern mountain bikes, particularly those equipped with Fox s legendary 803 rear shock system. This coil spring is engineered to work seamlessly with the Fox 803-04-144 rear shock, offering an optimal blend of stiffness, rebound control, and ride quality for aggressive trail riding, enduro, or all-mountain disciplines. Crafted from high-grade **steel**, the spring is heat-treated and precision-wound to ensure consistent performance under extreme loads, providing reliable support for riders weighing between **200 300 lbs (90 136 kg)** while maintaining a **400mm travel** capacity. The **2.8-inch (71mm) coil diameter** strikes a balance between responsiveness and comfort, allowing the shock to efficiently absorb impacts while delivering crisp, predictable feedback to the rider. Whether tackling rough descents, technical singletrack, or repeated jumps, this coil spring enhances the shock s ability to maintain stability and energy return, reducing fatigue and improving overall control. Built to withstand the demands of frequent use, this component is a critical upgrade for riders seeking to fine-tune their bike s suspension for better traction, cornering, and ride consistency. Ideal for both stock and custom builds, the Fox 803-04-144 coil spring is a testament to the brand s commitment to innovation and performance, ensuring that your rear suspension delivers the precision and power needed to conquer any terrain.
### **Pros and Cons of buying a Fox 803-04-144 Steel Rear Shock (Coil Spring 400 2.8)**
#### **Pros:**1. **High-Quality Construction** Fox is a well-known brand in off-road suspension, known for durability and performance in demanding conditions.
2. **Steel Spring Option** The steel spring (400 2.8) is heavier and more robust than coilovers, making it ideal for aggressive off-roading, heavy loads, or extreme terrain where coilovers might sag or compress too much.
3. **Adjustable Shock** The Fox 803 series is designed for rebound and compression damping adjustments, allowing fine-tuning for different riding styles and conditions.
4. **Compatibility** This shock is likely designed for specific vehicles (check your bike s model), ensuring proper fitment and performance.
5. **Long Lifespan** Fox shocks are built to last, especially in steel spring configurations, reducing the need for frequent replacements.
6. **Better Weight Distribution** Steel springs provide a firmer ride, which can improve handling and stability in rough terrain.
7. **Off-Road Performance** The robust design helps absorb heavy impacts, making it suitable for rock crawling, sand, and mud.
#### **Cons:**1. **Higher Initial Cost** Fox shocks are premium-priced, which may be a significant investment compared to aftermarket or generic alternatives.
2. **Weight** Steel springs add extra weight to the rear end, which could slightly reduce acceleration and handling compared to lighter coilover setups.
3. **Less Comfort** Steel springs are stiffer, leading to a harsher ride on rough roads or pavement compared to softer coilovers.
4. **Maintenance Requirements** Like any high-performance shock, it may require periodic servicing (seal replacements, fluid changes) to maintain optimal performance.
5. **Potential Overkill for Light Use** If you primarily ride on pavement or light trails, a steel spring setup might feel unnecessarily stiff and may not offer enough comfort.
6. **Installation Complexity** Upgrading to a steel spring setup may require additional modifications (e.g., adjusting ride height, swapping out components) and professional installation.
7. **Limited Adjustability Compared to Coilovers** While adjustable, steel spring shocks may not offer the same level of fine-tuning as coilover systems with adjustable springs.
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### **Conclusion:**The **Fox 803-04-144 steel rear shock (400 2.8)** is an excellent choice if you prioritize **durability, off-road performance, and heavy-duty use** over comfort and weight savings. It s ideal for **aggressive off-roaders, rock crawlers, or those carrying heavy loads** who need a robust suspension solution. However, if you prefer a **softer, more comfortable ride** or mostly ride on pavement, a coilover setup might be a better fit.
### **Recommendation:**- **Buy it if:** You frequently ride in **extreme off-road conditions**, need maximum durability, or require a stiff setup for heavy loads.
- **Consider alternatives if:** You want a **lighter, more adjustable setup** (coilovers) or prioritize **comfort on mixed terrain**.
- **Verify compatibility** with your vehicle s suspension geometry before purchasing.
- **Budget for installation** this may require professional help to ensure proper setup and ride height adjustments.
For most **serious off-roaders**, this Fox shock is a strong investment. For **casual riders or pavement-focused use**, explore coilover options or lighter spring rates first.
Details:
Used like new Fixations steel coil spring 400lb x 2.80 and 5.25 total length .
part #: 80304144 prices
- $39.00-$51.91
specifications ribicycl:
- brand: Fox
- mpn: 803-04-144
- part type: Coil
- set includes: Coil Spring
- shock type: Coil Shock
- unit type: Lb
- upc: 821973501710
payments ribicycl:
- other
- wallet: Google-pay
- credit card: Visa
seller ribicycl:
- rating: 100.0%
- city: Eureka, California
- # reviews: 33
general ribicycl:
- condition: Used
- Cycling > Bicycle Components Parts > Rear Shocks
returns ribicycl:
- policy: No Returns
offer ribicycl:
- quantity: 1
- options: Ship-to-home
- sold: 0
- started: March 22, 2026
- availability: In Stock
shipping ribicycl:
- carrier: USPS
- transit: 5-11 Days
- class: Standard
- type: Calculated
- cost: $8.65
- service: USPS Ground Advantage
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