The Fox 38 Performance Elite suspension fork is designed specifically for aggressive enduro and all-mountain riding. It combines stiffness, travel, and adjustability, targeting riders who demand precise handling and resilience under extreme terrain. This guide covers everything from installation and tuning to troubleshooting and component compatibility.
Tools Required
- Torque wrench [paid link] with appropriate bits (4mm, 5mm, 6mm hex)
- Crown race setting tool
- Star nut setter (if not using a threaded insert)
- Shock pump (up to 300 psi)
- Suspension sag meter or ruler
- Grease and carbon assembly paste
- Caliper alignment tool (optional)
Technical Overview of the Fox 38 Performance Elite
The 38 Performance Elite shares much of its architecture with the Factory series but forgoes the Kashima coating. It includes the GRIP2 damper, elliptical steerer tube, and floating axle system. With travel options ranging from 160mm to 180mm, it’s aimed at demanding trail conditions and high-impact riding.
The fork features 38mm stanchions for increased stiffness, a lower leg bypass channel for improved small bump compliance, and bleed valves for pressure equalization.
Installation Procedure
Before installation, ensure the fork steerer tube is cut to match your bike’s head tube and cockpit stack. If you’re uncertain, leave extra length and adjust after fitment.
Begin by installing the crown race onto the steerer tube, followed by the star nut. Insert the fork into the head tube and secure the headset components. Align the stem with the front wheel, then torque the stem bolts and top cap bolt to manufacturer specifications.
Install the front wheel with the floating axle system, ensuring proper alignment. Torque the axle to 19.7 Nm, and tighten the pinch bolts sequentially.
Adjustment and Tuning
The Fox 38 Performance Elite uses the GRIP2 damper, offering four-way adjustability:
- High-speed compression (HSC)
- Low-speed compression (LSC)
- High-speed rebound (HSR)
- Low-speed rebound (LSR)
Start by setting sag between 15–20% of total travel. Inflate the air spring to the recommended pressure using Fox’s setup chart as a starting point. Use the rebound and compression clickers to fine-tune the ride feel. For technical descents, reduce HSC and HSR for increased compliance. Increase LSC and LSR for support during slow, technical climbs.
Maintenance Intervals and Procedures
Routine maintenance ensures optimal performance and longevity. Every 30–50 hours, clean the dust wipers and apply suspension-specific lubricant. At 100 hours, perform a full lower leg service, replacing bath oil and cleaning seals.
Use isopropyl alcohol to wipe internal surfaces and apply fresh 20wt Gold oil before reassembly. Ensure air spring and damper seals are inspected or replaced at this time.
At 200-hour intervals or yearly, perform a damper bleed and air spring rebuild.
Common Setup Issues and Troubleshooting
Harsh Small Bump Sensitivity
If the fork feels rigid over small trail chatter, verify air pressure isn’t too high. Reduce pressure slightly and recheck sag. Inspect the lower leg channels for blockage and use the bleed valves to release any trapped pressure.
Fork Dive Under Braking
Excessive fork dive can result from low LSC settings or improper air pressure. Increase LSC in two-click increments. If compression increases too much, revisit sag and rebalance settings.
Knocking or Rattling Noises
Noises during travel may stem from insufficient torque on the axle or loose headset components. Confirm all bolts are tightened to spec and inspect the floating axle fitment.
Inconsistent Rebound
If the rebound varies on successive hits, inspect oil levels and perform a damper bleed. Rebound inconsistencies typically arise from air in the damper circuit.
Customization and Performance Optimization
One of the standout features of the 38 Performance Elite is its tunability. Riders can install volume spacers in the air spring to adjust the spring curve. More spacers result in a more progressive feel, ideal for hard landings and bike park usage.
Additionally, the GRIP2 damper allows precise calibration to suit trail types. For loamy, slow terrain, reducing rebound and compression can improve grip. In contrast, rocky, high-speed trails benefit from firmer damping settings.
Upgrading the fork’s internals with Fox’s heritage decals or integrated fender adds cosmetic and functional enhancements without affecting core performance.
Compatibility with Other Drivetrain and Frame Components
The 38 Performance Elite uses a 1.5″ tapered steerer and 110mm Boost spacing. Ensure your frame accepts a tapered fork and Boost front axle. Brake mounts are Post Mount 180, compatible with larger rotors using adapters.
The fork is designed around modern 29″ wheels but supports 27.5″ with appropriate offset configurations. It works best with 44mm rake on most trail and enduro geometries but is available in 51mm rake for certain platforms.
Drivetrain components like electronic shifting (SRAM AXS or Shimano Di2) pose no interference, but ensure cable routing does not affect fork crown clearance or interfere with the damper knobs.
Comparison with Similar Suspension Forks
Fox 38 Factory
The Factory model includes Kashima coating for enhanced durability and a smoother feel. However, performance-wise, both forks use the same GRIP2 damper and offer nearly identical adjustability. The Performance Elite is a more cost-effective option without sacrificing performance.
RockShox ZEB Ultimate
The ZEB Ultimate competes directly with the Fox 38. While both offer similar stanchion diameters and tuning features, the Fox GRIP2 damper is widely regarded for offering finer adjustability. However, ZEB’s ButterCups and DebonAir+ spring offer a slightly more compliant feel on high-frequency chatter.
Öhlins RXF38 m.2
Öhlins’ offering is plusher out of the box with a coil-like feel. However, it lacks the sheer tuning range of the GRIP2 damper. Fox also has a broader service network and easier access to spare parts.
Final Verdict
The Fox 38 Performance Elite positions itself as one of the top contenders for enduro and all-mountain use. With its robust chassis, high-level damper, and extensive tuning options, it bridges the gap between privateer affordability and professional performance. Riders seeking a dependable, tunable fork without the premium finish of the Factory model will find it a compelling choice.
FAQs
1. How much does the Fox 38 Performance Elite weigh?
It weighs approximately 2,360 grams (5.2 lbs) without the axle.
2. Can I install a Fox 38 Performance Elite on a trail bike?
Yes, if the frame supports 160–180mm fork travel and Boost axle spacing. Always confirm geometry compatibility.
3. How do I know which air pressure is right for me?
Start with Fox’s pressure chart based on rider weight, then fine-tune using sag measurement and trail testing.
4. Is the GRIP2 damper better than FIT4?
For aggressive riding and tuning flexibility, yes. GRIP2 offers independent compression and rebound controls, unlike FIT4’s simplified adjustments.
5. Can I convert it to a Factory version later?
Functionally, it’s not necessary. Kashima coating is the main difference, but GRIP2 internals remain the same.
6. What’s the warranty on the Fox 38 Performance Elite?
Fox offers a one-year warranty covering manufacturing defects, extendable through registration.