The Fox 36 Factory GRIP2 is a high-performance suspension fork designed for aggressive trail and enduro riding. Renowned for its precision damping and external tuning options, this fork is a benchmark in the world of suspension performance. To ensure longevity and optimal operation, understanding how to service, adjust, and maintain the 36 Factory GRIP2 is essential for any rider. This guide offers a detailed breakdown of everything you need to know about maintaining this specific model.
Tools Required
- Allen keys [paid link] (2mm to 8mm)
- Torque wrench [paid link] (Nm calibrated)
- Suspension oil (Fox 20wt Gold and Float Fluid)
- Clean rags and isopropyl alcohol
- Seal driver and pick set
- Oil measuring syringe
- Fork-specific vice or soft jaws for clamping
- Genuine Fox 36 service kit
- Plastic tire lever (for seal removal)
- Shock pump
Installation of the Fox 36 Factory GRIP2 Fork
Installing the Fox 36 Factory GRIP2 begins with correct headset fitment and accurate steerer tube cutting. Riders must ensure that the fork’s axle-to-crown height is compatible with their bike’s geometry. Once the steerer is trimmed and the star nut or compression plug is set, the fork should be inserted into the head tube, aligning it with the stem and top cap hardware.
Tighten the headset components to manufacturer-recommended torque values, then install the front wheel into the 15QR Kabolt axle system. It is important to use the correct torque on the axle bolt to prevent movement or over-compression of the fork lowers.
Initial Setup and Adjustment
The 36 GRIP2 offers external adjustments including high- and low-speed compression and rebound. Begin setup by adjusting the air pressure to match rider weight and sag targets. Recommended sag is typically between 15-20% of the total fork travel.
Each damping circuit is independently adjustable:
- High-Speed Compression (HSC): Controls big hits and hard landings.
- Low-Speed Compression (LSC): Influences cornering, braking, and pedaling support.
- High-Speed Rebound (HSR): Governs fast recovery from large compressions.
- Low-Speed Rebound (LSR): Affects traction and control over successive small bumps.
Use baseline settings from Fox’s tuning chart, then fine-tune on the trail based on ride feel and terrain type.
Routine Maintenance Procedures
Routine maintenance ensures peak performance and prevents wear. The fork should undergo a lower leg service every 30 to 50 hours of ride time. This involves removing the lowers, cleaning internal surfaces, replacing wiper seals, and replenishing lubrication oil.
Inspect the stanchions for scoring and the wipers for wear or contamination. Re-lubricate with Float Fluid and refill the bath oil to specified volumes using a syringe for accuracy.
Full Damper and Air Spring Service
At 100 to 125-hour intervals, a full service of the GRIP2 damper and EVOL air spring is recommended. This requires removal of the damper cartridge and air shaft for internal inspection and seal replacement.
The GRIP2 damper is a closed cartridge system and must be serviced in a clean environment using a vacuum bleeder (if available) to eliminate air bubbles during oil fill. Air spring service includes inspecting the air shaft, applying slickoleum to seals, and checking for wear in the negative and positive volume chambers.
Troubleshooting Common Setup Issues
Incorrect setup or wear can lead to performance degradation. Here are common symptoms and their potential causes:
- Harsh bottom-out: Too low air pressure or insufficient HSC damping.
- Fork not rebounding fully: Excess rebound damping or internal air pressure imbalance.
- Stiction or sticky travel: Contaminated or worn wiper seals and bushings.
- Excessive dive under braking: Low LSC or insufficient spring pressure.
Address these issues by returning to baseline settings and confirming mechanical integrity before further tuning.
Customization for Performance Optimization
The 36 GRIP2 allows deep customization. Riders can install volume spacers to adjust air spring progressiveness. Reducing volume increases ramp-up for aggressive terrain, while removing spacers softens mid-stroke behavior.
Additionally, tuning the damping curve through external clickers gives riders flexibility to match specific trail conditions—tight technical trails may benefit from increased LSC, while high-speed descents may require increased HSR for stability.
Compatibility with Drivetrain and Frame Standards
The Fox 36 Factory GRIP2 is available in 27.5” and 29” options with boost axle spacing (110mm). It uses a 1.5” tapered steerer tube, compatible with modern headsets. Brake compatibility is post mount for 180mm rotors, expandable with adapters.
This fork is designed for use with 12-speed drivetrains and dropper post cable routing, but it does not interfere with drivetrain components due to its precision arch and stanchion clearance.
Model Comparison: GRIP2 vs FIT4
The GRIP2 damper offers superior adjustability over the FIT4 version. While FIT4 is lighter and simpler, it lacks high-speed rebound and compression circuits. Riders prioritizing technical tuning and downhill control should opt for GRIP2. FIT4 suits those wanting minimal fuss and general trail performance.
Long-Term Care Tips
To extend fork lifespan:
- Store the bike upside down occasionally to lubricate foam rings.
- Avoid pressure washing near seals or adjusters.
- Periodically cycle the fork without weight to redistribute oil.
- Monitor air pressure with a shock pump to detect slow leaks.
FAQs
1. How often should I service the Fox 36 Factory GRIP2 fork?
Basic lower leg service should be performed every 30 to 50 riding hours. Full damper and air spring service is recommended at 100 to 125 hours.
2. Can I install volume spacers myself?
Yes, volume spacers can be installed at home by removing the top cap of the air spring leg. Ensure you deflate the air chamber fully before attempting this.
3. What oil should I use for servicing the 36 GRIP2?
Fox 20wt Gold for the lower leg bath and Fox Float Fluid for air spring lubrication are required. Use precise volumes as listed in Fox’s technical documents.
4. Is the GRIP2 damper tunable without disassembly?
Yes, it offers four external dials for on-the-fly tuning of compression and rebound circuits.
5. What are signs of worn fork seals?
Signs include oil leakage, reduced travel sensitivity, and visible dirt retention around the wiper seals.
6. Can the GRIP2 be upgraded from a FIT4 model?
Yes, the damper can be swapped if the chassis is compatible. However, this should be done by an experienced technician due to internal pressurization and bleed requirements.
Conclusion
Maintaining the Fox 36 Factory GRIP2 fork is critical for achieving top-tier performance on rugged terrain. Regular service, careful tuning, and understanding of its advanced damper system will ensure your fork continues to perform flawlessly. This model is engineered for riders who demand precision and adjustability, making it a premier choice for enduro and aggressive trail riding.