The Fox 34 AWL (Adventure Without Limits) suspension fork is a robust and versatile component designed for all-road and light trail riding. Known for its adaptability, performance, and reliable build, the 34 AWL caters to riders seeking comfort and control in diverse conditions. Whether you’re a seasoned cyclist or just starting to explore suspension servicing, this guide will walk you through each step required to maintain, troubleshoot, and optimize the Fox 34 AWL at home.
Tools Required
- 2.5 mm, 5 mm, and 6 mm hex keys [paid link]
- Torque wrench [paid link] with Nm setting
- Shock pump (for air spring adjustment)
- Suspension-specific grease (e.g., Fox Float Fluid)
- Suspension oil (Fox 20wt Gold or as specified)
- Clean rags and isopropyl alcohol
- Oil pan for waste collection
- Pick tool and seal driver (or socket substitute)
- Rubber mallet
- Zip ties or cable ties for control line management
Understanding the Fox 34 AWL
The Fox 34 AWL is built around a 34 mm stanchion chassis, offering stiffness and strength while maintaining a reasonable weight profile. It features an air spring, a GRIP damper for controlled rebound and compression, and a chassis optimized for e-bike and adventure bike platforms. The fork is factory-tuned for consistent performance in mixed riding conditions.
Installation Overview
Installing the Fox 34 AWL requires careful preparation. Begin by ensuring the steerer tube is cut to the appropriate length for your frame. Use a crown race setter to properly seat the crown race on the steerer. Insert the fork into the head tube, align headset components, and torque the top cap and stem bolts to specification. Install the thru-axle wheel and torque according to Fox’s guidelines.
Ensure the brake caliper mounts are aligned with the rotor. If needed, use 180 mm or 203 mm post-mount adapters. Finally, route the brake hose and lock it using zip ties, ensuring no interference with the fork’s travel.
Air Spring Setup and Adjustment
Setting the air pressure in your Fox 34 AWL fork is critical for optimal performance. Start by consulting the Fox air pressure chart for your rider weight. Connect the shock pump and inflate the fork to the suggested PSI. Bounce the front end to equalize pressure between positive and negative chambers.
Check sag using a zip tie around the stanchion. You’re aiming for 15-20% sag for light trail or adventure riding. Adjust pressure accordingly and re-check sag before proceeding.
GRIP Damper Adjustments
The Fox 34 AWL features a GRIP damper with an open cartridge design. This damper uses an adjustable knob for compression damping and a dial for rebound on the lower right leg.
Set rebound by turning the red dial clockwise for slower rebound and counterclockwise for faster return. Compression is controlled via the top cap knob — use firmer settings for road use and lighter settings for technical trails. Always make adjustments in small increments and test ride to fine-tune.
Lower Leg Service Procedure
Performing a lower leg service every 30–50 hours of ride time helps maintain smooth performance and extends fork longevity.
- Remove the front wheel and brake caliper. Disconnect the hose or unbolt the adapter for clearance.
- Use a hex wrench to remove the damper and air side bolts. Gently tap with a rubber mallet to disengage.
- Drain oil from the lowers into the oil pan. Allow it to fully drain and clean residual fluid using isopropyl alcohol.
- Remove old foam rings and seals using a pick tool. Clean thoroughly before installing new parts.
- Apply suspension grease to new seals and foam rings. Install them with a seal driver or equivalent socket.
- Slide lowers back onto stanchions, add fresh oil through the bottom openings. Use the volume specified in the Fox manual.
- Reinstall bolts and torque to factory specification. Reattach the brake caliper and reinstall the front wheel.
Air Spring Maintenance
For air spring servicing, typically every 100 hours, remove the top cap using a 6 mm hex key. Carefully extract the air shaft assembly and inspect for wear. Clean and re-grease the internal parts with Float Fluid or recommended grease.
Replace any worn o-rings or seals. Reinstall the air shaft, torque the top cap, and reset the air pressure. Verify smooth operation before riding.
Troubleshooting Setup Issues
Loss of Travel: Check air pressure and verify the air chamber equalization. Inspect the negative spring if the fork doesn’t return fully.
Sticky Performance: Grease contamination or worn seals often cause stiction. A lower leg service typically resolves this.
Excessive Rebound or Harshness: Adjust the rebound dial and ensure the damper knob is not set too firm. Replace damper oil if performance doesn’t improve.
Oil Leaks: This often indicates damaged seals or improper installation. Disassemble the lowers and inspect the wiper seals and foam rings.
Optimizing Performance
The Fox 34 AWL can be optimized using volume spacers in the air spring. Adding spacers increases progression, making the fork harder to bottom out. This is especially useful for heavier riders or aggressive terrain.
Start with the factory-recommended number of spacers and adjust based on bottom-out performance. Fox supplies spacers with their tuning kits. Ensure correct installation and reset air pressure afterward.
Compatibility Considerations
The Fox 34 AWL is designed for 110 mm Boost spacing with a 15 mm thru-axle. It is compatible with flat mount and post mount brakes depending on the version. Ensure your bike frame and front hub match these specifications.
Internally, the fork is only compatible with Fox GRIP dampers and standard air spring assemblies for the 34 mm chassis. Avoid mixing internals from FIT4 or 36 mm models.
Comparing Fox 34 AWL with Similar Forks
Compared to the Fox 34 Performance, the AWL offers simplified tuning and a heavier-duty chassis suitable for e-bikes and cargo bikes. It lacks the Kashima coating and FIT4 damper but is more cost-effective and lower-maintenance.
Against RockShox 35 Gold, the Fox 34 AWL offers better mid-stroke support and chassis stiffness. However, RockShox’s DebonAir spring may feel more supple initially, making rider preference and terrain key deciding factors.
Common Customizations
- Upgrading Decals: Aesthetic customization with Fox or third-party graphics.
- Custom Air Shaft Lengths: For riders needing different travel, Fox offers compatible air shafts.
- Mud Guard Compatibility: The 34 AWL accepts bolt-on mudguards for better protection.
- Grip2 Upgrade: Not typically supported; GRIP damper is standard for this model.
Maintenance Schedule Summary
| Interval | Task | Notes |
|---|---|---|
| Every Ride | Visual inspection, clean stanchions | Use a microfiber cloth |
| 30-50 hours | Lower leg service | Replace oil, inspect foam rings |
| 100 hours | Air spring and damper service | Check internal seals, re-grease |
| Annually | Full overhaul | Optional based on usage intensity |
FAQs
How often should I service my Fox 34 AWL fork?
Every 30–50 riding hours for lowers, and every 100 hours for a full air spring and damper service.
Can I increase the travel on my Fox 34 AWL?
Yes, by replacing the air shaft assembly with a longer travel version compatible with the 34 mm chassis.
Why does my fork feel harsh on small bumps?
Likely due to dried-out wiper seals or improper air pressure. A lower leg service and correct sag setup can help.
Is the Fox 34 AWL suitable for aggressive trail riding?
While it’s capable, it’s best suited for moderate terrain, adventure riding, or light trail use rather than aggressive downhill.
Can I upgrade the GRIP damper to a FIT4 or GRIP2?
No, the Fox 34 AWL is not designed for internal upgrades beyond its standard GRIP damper.
Does the Fox 34 AWL support bolt-on fenders?
Yes, it includes mounts for Fox’s bolt-on mudguard or compatible third-party options.