The Fox DHX2 Factory [paid link] rear shock is one of the most respected and sought-after components in the world of mountain biking. Designed for riders who demand precision, adjustability, and top-tier performance, the DHX2 Factory [paid link] is built to handle the most aggressive terrain and provide superior comfort and control. This guide will take you through its installation, adjustment, maintenance, troubleshooting, and customization to ensure your DHX2 Factory shock performs at its best. We will also discuss compatibility with other drivetrain components and compare it to similar models to help you make an informed decision.
Installation of the Fox DHX2 Factory Rear Shock
Tools Required
- 8mm Allen wrench [paid link]
- Torque wrench [paid link] (5–10 Nm)
- 15mm or 16mm spanner (depending on your frame)
- Shock pump
- Rags or shop towels
- Anti-seize lubricant (optional)
Installation Steps
- Prepare the Bike and Shock: Place your bike on a stable work stand. Clean the area where the shock will be mounted, removing any dirt and grime to avoid contamination.
- Attach the Shock to the Frame: Position the shock’s eyelets in alignment with the mounting hardware on the frame. Slide the eyelet through the hardware and use an 8mm Allen wrench [paid link] to secure it.
- Tighten the Mounting Bolts: Use a torque wrench [paid link] to tighten the bolts to the manufacturer-recommended torque (usually 5–10 Nm). Avoid over-tightening as this can damage the shock or the frame.
- Install the Shock’s Bottom Eyelet: Depending on your frame, this step may require a 15mm or 16mm spanner to tighten the bolt. Make sure that the shock is seated properly in the mounting position.
- Check for Clearance: Ensure that the shock has enough clearance with the frame or any other parts. The shock should move freely without any obstruction.
- Set the Sag: Use a shock pump to adjust the air pressure. The recommended sag (compression of the shock under rider weight) is typically between 25% and 30% of the shock’s total stroke.
- Final Inspection: Double-check all connections to ensure everything is tight and secure. Ensure there are no signs of interference or friction.
Adjustment and Tuning of the DHX2 Factory Rear Shock
The DHX2 Factory offers a range of adjustments that allow riders to fine-tune their ride to specific needs. The key adjustments include:
1. Air Spring Pressure:
Adjusting the air spring pressure directly impacts the shock’s overall compression and rebound. The DHX2 Factory features a high-pressure air spring, and it is essential to set the correct pressure to match your rider weight and riding style. Use a shock pump to set the pressure, typically between 200 and 250 PSI, depending on your body weight and preferred riding characteristics.
2. Rebound Damping:
The rebound damping controls the shock’s ability to return to its original position after compression. Too much rebound damping will slow the shock’s return, making it feel sluggish. Too little will make the shock feel bouncy. Adjust this setting using the red rebound dial located on the shock body. A good starting point is to set the rebound to medium and adjust from there based on your riding style and conditions.
3. Compression Damping:
The compression damping on the DHX2 Factory rear shock can be finely tuned via both low-speed and high-speed compression adjustments. These settings determine how the shock compresses under load.
- Low-Speed Compression: This dial controls the shock’s response to slow, steady inputs like pedaling or light braking. Set this adjustment to a medium level and experiment with it to achieve optimal ride comfort and control.
- High-Speed Compression: This dial is used for faster impacts, like those encountered on rough, technical terrain. A stiffer setting here helps maintain stability during high-speed descents.
4. Bottom-Out Control:
The DHX2 Factory also features a bottom-out control, which helps prevent the shock from bottoming out under extreme compression. Adjust this feature based on the type of riding you do, especially if you encounter steep, rocky descents.
Maintenance of the DHX2 Factory Rear Shock
Regular maintenance ensures your shock performs at its peak [paid link] and extends its lifespan. Follow these steps to keep your DHX2 Factory rear shock in top condition:
1. Clean the Shock After Each Ride:
Dirt and grime can damage the seals and reduce the performance of the shock. After each ride, wipe down the shock with a clean rag and inspect for any signs of leakage or damage. Pay close attention to the shock’s seals and the area around the mounting points.
2. Check for Leaks:
If you notice any oil or air leakage from the shock, it’s essential to address this immediately. Leaking oil could mean that the seals are worn, while an air leak suggests a problem with the air chamber.
3. Lubricate Seals:
Every few months, apply a small amount of Fox-approved lubricant to the seals. This reduces friction and helps prevent wear and tear. Be cautious not to over-lubricate, as this can attract dirt.
4. Shock Rebuild:
The DHX2 Factory shock is designed for long-term durability, but regular rebuilds are necessary for optimal performance. Depending on your usage and the conditions you ride in, it’s recommended to service the shock every 50-100 hours of riding. This involves replacing the seals, oil, and other internal components to keep the shock operating smoothly.
Troubleshooting Common Set-Up Issues
1. Shock Bottoming Out:
If you’re experiencing bottoming out, it could be due to too little air pressure or insufficient compression damping. First, increase the air pressure to ensure the shock has enough support. If the problem persists, check your compression damping settings and adjust them accordingly.
2. Bouncing or Excessive Rebound:
Excessive bouncing is often caused by too little rebound damping. Increase the rebound damping until the shock returns to its original position at a reasonable speed. If the shock still feels bouncy, you may need to adjust both the rebound and compression settings for a better balance.
3. Leakage:
If you notice any fluid leakage, this could indicate that the shock’s seals are worn or damaged. In this case, a shock rebuild may be necessary, or you can replace the seals and oil yourself if you’re familiar with the procedure.
Customization and Optimization for Better Performance
The Fox DHX2 Factory rear shock is designed to offer a high degree of customization, allowing riders to tailor their bike’s suspension to their unique needs. Experimenting with different settings for sag, compression, and rebound will help you find the perfect setup for your riding style. In addition, pairing the DHX2 Factory with a compatible fork and the right tire pressures will significantly enhance your overall performance.
Compatibility with Other Drivetrain Components
The DHX2 Factory rear shock is compatible with a wide range of mountain bike frames, especially those with a focus on aggressive trail riding, downhill, and enduro disciplines. However, compatibility may vary depending on your specific bike’s rear suspension design and stroke length. Always check the frame’s specifications to ensure proper shock fitment.
Comparison with Similar Models
When compared to other rear shocks in its category, such as the RockShox Super Deluxe and the Cane Creek Double Barrel, the DHX2 Factory stands out with its superior tuning options and smoother ride. The Fox shock offers more precise control over low-speed compression and rebound damping, making it ideal for riders who want to fine-tune every aspect of their suspension. Additionally, its coil spring offers better performance and consistency under heavy loads compared to air-spring shocks.
While other models like the RockShox Super Deluxe are great for riders seeking more affordable options, the DHX2 Factory’s performance is unmatched in terms of adjustability and overall ride quality.
Conclusion
The Fox DHX2 Factory rear shock is a high-performance, highly adjustable suspension component that excels in providing riders with exceptional control and comfort in aggressive conditions. By following the installation, adjustment, and maintenance guidelines outlined above, you can ensure that your shock remains in peak [paid link] condition for years of trail-riding enjoyment. Whether you’re looking to fine-tune your ride for competitive racing or simply optimize your mountain biking experience, the DHX2 Factory stands out as a top choice for any serious rider.