FOX 803-04-153 Steel Rear Shock Coil Spring Travel Tlg 821973501888 250 Lb. 3.25 6.468

( Brand: Fox ), ( Manufacturer Part Number: 803-04-153 ), ( Part Type: Coil ), ( Color: Black ), ( Material: Na, Steel ), ( Set Includes: Coil Spring ), ( Unit Type: Lb ), ( Compatible Bike Type: Mountain Bike ), ( Stroke Length: 3.25 ), ( Unit Quantity: 250 ), ( UPC: 821973501888 )

Review FOX Steel Rear Shock Coil Spring 250 Lb. 3.25 Inch Travel 6.468 Tlg

The **Fox 803-04-153 Steel Rear Shock Coil Spring** is a high-performance, precision-engineered component designed to elevate the handling, comfort, and durability of off-road and aggressive on-road motorcycles, particularly those built for demanding riding conditions. This coil spring is specifically tailored for rear suspension systems with **250mm (10-inch) of travel**, making it an ideal match for dual-sport bikes, adventure touring models, and hardtail or fully suspended enduro machines that require a balance of stiffness, rebound control, and long-lasting resilience. Crafted from **high-grade steel**, the spring is heat-treated and precision-wound to ensure consistent performance under extreme loads, whether navigating rough trails, steep descents, or aggressive cornering. With a **6.468-inch (164.3mm) total length**, this spring is engineered to work seamlessly with Fox s **803 series rear shocks**, delivering optimal compression and rebound tuning for riders who demand both responsiveness and comfort. The design incorporates Fox s signature **steel coil construction**, which provides superior durability compared to fiberglass or composite alternatives, making it well-suited for riders who push their bikes to the limit. Whether tackling rocky terrain, deep sand, or high-speed maneuvers, this coil spring ensures a stable, predictable ride by maintaining consistent preload and damping characteristics, reducing fatigue, and minimizing bottoming-out risks. Built to withstand the rigors of off-road use, the **803-04-153** is a critical upgrade for riders seeking to fine-tune their suspension setup, enhance traction, and extend the lifespan of their Fox shock system. Its compatibility with a wide range of motorcycle models from lightweight dual-sports to heavier adventure bikes makes it a versatile choice for enthusiasts looking to optimize their ride without compromising on performance or reliability.

### **Analysis of Fox 803-04-153 Steel Rear Shock (250cc, 3.25" Travel, 6.468" Total Length)**

1. **Durability and Strength** The steel construction makes this shock highly resistant to corrosion, extreme temperatures, and mechanical stress, ideal for off-road and heavy-duty use.

2. **Long-Lasting Performance** Steel shocks are less prone to wear compared to aluminum or composite alternatives, reducing long-term replacement costs.

3. **High Load Capacity** Suitable for aggressive riding styles, heavy riders, or modified bikes where extra strength is needed.

4. **Compatibility with Aggressive Suspension Setups** The 3.25" travel and robust design work well for bikes with high-performance suspension tuning.

5. **Cost-Effective for Heavy Use** While initially more expensive than basic shocks, the longevity often offsets the upfront cost in high-mileage or demanding applications.

6. **Easy to Modify** Steel shocks can be adjusted (e.g., rebound damping, sag) with aftermarket parts, offering flexibility for tuning.

7. **Reliability in Extreme Conditions** Performs well in mud, sand, or rocky terrain where other materials may fail.

1. **Higher Weight** Steel is significantly heavier than aluminum or carbon fiber shocks, which can affect handling and maneuverability, especially on lighter bikes.

2. **Limited Heat Dissipation** Steel conducts heat poorly, which can lead to thermal sag (loss of firmness under load) in prolonged use, particularly in high-performance or aggressive setups.

3. **Less Vibration Damping** Steel shocks transmit more road vibrations to the rider compared to modern composite or aluminum designs with better damping materials.

4. **Less Aesthetic Appeal** The bulky, industrial look may not suit riders who prefer sleek, lightweight components.

5. **Potential for Sag Over Time** If not properly tuned or if the spring rate is too soft for the rider s weight, the shock may bottom out or sag excessively.

6. **Compatibility Issues** Some modern bikes or aftermarket suspension systems may require specific shock mounts or adjustments, potentially complicating installation.

7. **Higher Initial Cost** While durable, the upfront price is higher than entry-level shocks, which may be a barrier for budget-conscious buyers.

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The **Fox 803-04-153 steel rear shock** is an excellent choice for riders prioritizing **durability, strength, and off-road performance** over weight savings or modern tuning flexibility. It excels in **aggressive riding, heavy-duty applications, or extreme conditions** where other shocks might fail. However, its **heaviness, thermal limitations, and lack of advanced damping** make it less ideal for **street-focused or lightweight bikes** where responsiveness and comfort are critical.

If you ride a **heavily modified dirt bike, enduro rig, or a bike with a high load capacity**, this shock is a **strong, long-term investment**. For **trail or street bikes** where weight and smoothness matter more, a **lighter aluminum or composite shock** (e.g., Fox 2.0 or 3.0 series) may be a better fit.

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- You ride in **aggressive off-road conditions** (rock crawling, heavy trails, desert racing).

- Your bike is **modified for high performance** (e.g., lifted suspension, heavy weight).

- You **prioritize durability over weight** and plan to keep the bike for many years.

- You re willing to **tune the shock** (e.g., adjust rebound damping, sag) for optimal performance.

- You ride primarily on **trails or streets** where weight and comfort are important.

- Your bike is **stock or lightly modified** and doesn t need extreme strength.

- You prefer **modern suspension tech** (e.g., adjustable rebound, better heat dissipation).

- Budget is a concern, as the upfront cost is higher than basic shocks.

- For **trail bikes**, a **Fox 2.0 or 3.0 aluminum shock** (e.g., 803-04-153 s aluminum counterpart) offers better weight savings and damping.

- For **street/dual-sport**, a **lightweight composite shock** (e.g., Fox 2.0 or hlins) may be more suitable.

- If **thermal sag** is a concern, consider **aftermarket damping solutions** (e.g., Fox s rebound adjusters) to mitigate issues.

**Final Verdict:** This is a **premium off-road shock** for riders who demand **uncompromising strength and longevity** at the cost of weight and modern tuning features. For most other applications, a lighter shock would be a better balance of performance and practicality.

Details:

3.25 travel, 250lb/in rate Ultra-durable black powder-coated steel spring for FOX DHX and DHX2 shocks.

part #: 80304153 prices

• $39.00-$52.53

specifications ribicycl:

• brand: Fox
• mpn: 803-04-153
• part type: Coil
• color: Black
• material: Na, Steel
• set includes: Coil Spring
• unit type: Lb
• compatible bike type: Mountain Bike
• stroke length: 3.25
• unit quantity: 250
• upc: 821973501888

payments ribicycl:

• credit card: Mastercard
• other
• wallet: Paypal

offer ribicycl:

• quantity: 1
• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: February 28, 2026

shipping ribicycl:

• type: Calculated
• transit: 5-11 Days
• carrier: USPS
• service: USPS Ground Advantage
• cost: $0.00
• class: Standard

seller ribicycl:

• rating: 100.0%
• city: Charlotte, North Carolina
• # reviews: 63

returns ribicycl:

• policy: No Returns

general ribicycl:

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

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