The Fox 38 Performance Elite Suspension Fork is a top-tier choice for aggressive trail and enduro riders looking for exceptional stiffness, superior damping control, and enhanced ride customization. Built on the same chassis as the Factory model but without the Kashima coating, the Performance Elite version delivers premium performance with a stealthier look and excellent adjustability. This article offers an in-depth look into its installation, adjustment, maintenance, troubleshooting, and performance optimization.
Tools Required
- 6mm and 4mm hex wrenches
- Torque wrench [paid link]
- Suspension pump
- Shock oil (recommended by Fox)
- Clean rags and isopropyl alcohol
- Crown race setting tool
- Star nut installation tool
- Digital caliper [paid link] (for sag setup)
Installation Guide
Installing the 38 Performance Elite requires precision to ensure the fork performs correctly under aggressive riding conditions. Begin by cutting the steerer tube to fit your frame’s headtube and headset stack height, ensuring enough length for spacers and stem clamping. Install the star nut using a specific tool for alignment and depth control. Fit the crown race onto the base of the steerer using the appropriate setting tool to avoid damage to the fork’s crown.
Insert the fork into the headtube, align with spacers and stem, and torque all stem bolts evenly to manufacturer specifications. Attach the brake caliper to the fork’s post mounts and align it over the rotor. Check that the axle threads smoothly into the dropout and that the pinch bolts secure the axle without binding.
Adjustment Parameters
The Performance Elite 38 features GRIP2 damper technology, allowing for precise tuning with:
- High-speed and low-speed compression
- High-speed and low-speed rebound
- Air spring pressure adjustment
- Volume spacer configuration
Begin tuning by setting the air pressure according to rider weight, using Fox’s air chart as a baseline. Set sag between 15-20% of total travel for aggressive trail use. Adjust high- and low-speed compression knobs to match your terrain—open settings for rocky descents and firm settings for climbs and flow trails. Rebound tuning should follow a similar logic, slower for chunkier terrain and faster for smooth flow.
Maintenance Procedures
Routine maintenance is essential for maintaining performance and longevity. Lower leg service should be performed every 50 hours of ride time. This includes:
- Removing lower legs
- Cleaning stanchions
- Replacing foam rings and bath oil
- Inspecting seals for wear or damage
Every 125 hours, a full damper service is recommended. This requires bleeding the GRIP2 damper, inspecting internal shims, and replacing seals and oil. Always use Fox-specified oils and seals to maintain warranty and performance.
Wipe stanchions after every ride to remove dirt and prevent premature seal wear. Check torque settings on axle, brake mounts, and stem clamp regularly.
Troubleshooting Common Issues
Fork Feels Harsh Over Small Bumps
This is often due to too much low-speed compression. Reduce LSC a few clicks. Also, ensure the fork is not over-pressurized beyond the rider’s weight specification.
Excessive Dive During Braking
Add volume spacers to increase mid-stroke support or increase low-speed compression damping.
Inconsistent Rebound Behavior
This could indicate an air/oil imbalance or damper contamination. Conduct a lower leg service and check damper integrity.
Clicking or Clunking Sounds
Commonly caused by loose axle or headset. Confirm that the axle is fully tightened and headset bearings are preloaded correctly.
Customization and Optimization
Riders can fine-tune the 38 Performance Elite by modifying volume spacers in the air spring. This affects bottom-out resistance and mid-stroke support. The fork ships with a neutral setup but allows for up to five volume spacers.
Switching out fork oil for different viscosities—within Fox-approved ranges—can alter damper response. For example, slightly lighter oil may improve cold-weather performance.
Installing a fork mudguard via the integrated mounting points helps protect seals and lowers maintenance frequency, especially in wet environments.
Compatibility with Drivetrain and Frame Standards
The 38 Performance Elite is compatible with Boost 15x110mm hubs and flat-mount or post-mount disc brake calipers up to 203mm rotors. The fork’s tapered steerer fits modern enduro and trail frames and integrates smoothly with standard and integrated headsets.
Ensure that your frame supports the fork’s travel range—usually 160mm to 180mm—without voiding the manufacturer’s warranty. Also, verify that the fork rake (44mm or 51mm options) matches your bike’s intended geometry.
Model Comparison
While sharing the chassis with the Fox 38 Factory, the Performance Elite version lacks the Kashima coating. However, it retains the advanced GRIP2 damper and the same robust lower legs. Compared to the Fox 36 Performance Elite, the 38 offers greater stiffness and is better suited to enduro racing and bike park riding due to its larger 38mm stanchions and stronger crown structure.
When compared with RockShox’s Zeb Ultimate, the 38 offers more tuning range with independent HSC and LSC controls. However, the Zeb may appeal to riders seeking a slightly lighter package and easier initial setup.
Conclusion
The Fox 38 Performance Elite Suspension Fork stands as a benchmark in the high-performance enduro category. Its robust construction, wide-ranging adjustability, and GRIP2 damper make it a preferred choice for riders demanding precision and durability. With proper setup and regular maintenance, it delivers top-tier ride quality across diverse terrain.