A Beginner’s Guide to Tuning 34 Float Factory GRIP2 Suspension Forks

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The Fox 34 Float Factory GRIP2 suspension fork is a performance-focused component designed for aggressive trail riding, blending precise tuning capability with advanced damping control. With its externally adjustable GRIP2 damper and Factory-level Kashima coating, it delivers top-tier performance when properly set up. This guide provides a comprehensive walkthrough on how to install, tune, and maintain your 34 Float Factory GRIP2 fork for optimal trail performance.

Tools Required

  • Torque wrench [paid link] with appropriate hex bits
  • Shock pump (for air pressure adjustments)
  • Allen keys [paid link] (4mm, 5mm, and 6mm)
  • Suspension oil (Fox 20wt Gold)
  • Clean lint-free cloth
  • Suspension grease
  • Isopropyl alcohol
  • Measuring caliper
  • Work stand (optional but helpful)

Installation Overview

Proper installation is critical for ensuring safety and performance. Begin by verifying that your frame and headset are compatible with the steerer tube and axle spacing of the Fox 34 Float Factory GRIP2 fork.

The steerer tube should be cut to match your bike’s head tube and stem height. Use a crown race setter to install the race onto the fork. Slide the fork into the head tube, add spacers as needed, then mount the stem and top cap. Torque all bolts to manufacturer specifications.

Ensure the front wheel’s hub matches the fork’s axle standard (15x110mm Boost). Slide the axle through the fork and hub, then tighten to 19 Nm. Check that the disc rotor aligns perfectly within the brake caliper without rubbing.

Adjusting Air Spring Pressure

Setting the correct air pressure in the EVOL air spring is foundational to the fork’s performance. Begin by locating your recommended pressure based on rider weight using the Fox user manual chart. Use a shock pump to inflate the fork.

Ensure sag is set to 15-20% of total travel (about 15-20mm on a 130mm travel fork). Bounce on the bike several times to equalize the pressure before measuring sag. Adjust as needed and always replace the valve cap to prevent contamination.

Setting the GRIP2 Damping Adjustments

The GRIP2 damper offers independent High-Speed Compression (HSC), Low-Speed Compression (LSC), High-Speed Rebound (HSR), and Low-Speed Rebound (LSR) adjustments.

Start with factory baseline settings:

  • HSC: 5 clicks from closed
  • LSC: 10 clicks from closed
  • HSR: 6 clicks from closed
  • LSR: 10 clicks from closed

Test ride the fork on varied terrain, then adjust:

  • Increase HSC to resist bottoming on big hits
  • Reduce LSC to improve compliance on small bumps
  • Add HSR to control fast recovery after impacts
  • Reduce LSR if the fork feels sluggish returning

Each click noticeably affects ride quality; adjust conservatively and keep a log of your settings.

Regular Maintenance Schedule

Routine service is essential to maintain fork performance and longevity. Clean the stanchions after every ride and inspect the dust seals for debris. Apply suspension-specific lubricant to the seals periodically.

After 30 hours of riding:

  • Perform a lower leg service.
  • Replace bath oil and clean foam rings.

At 100 hours or annually:

  • Replace damper and air spring oil.
  • Inspect internal components for wear.

Always use OEM-specified fluids and torque settings to ensure compatibility and prevent damage.

Troubleshooting Common Set-Up Issues

Fork feels too harsh on small bumps – Decrease LSC or reduce air pressure slightly. Check that the stanchions are clean and the seals are not dry.

Fork dives excessively under braking – Increase LSC and ensure air pressure is adequate. Also, check that the rebound is not too fast.

Fork tops out with a clunking sound – Reduce rebound speed and inspect air spring for proper inflation.

Loss of travel or sag setting not holding – Check for air leaks around the Schrader valve or from the seals. Perform a basic air spring inspection.

Customizing Fork Feel for Specific Terrain

Trail preferences vary, and the 34 Float Factory GRIP2 fork offers ample adjustability to match. For rocky, technical descents, consider:

  • Adding volume spacers to increase ramp-up.
  • Increasing HSC and LSC to support aggressive riding.
  • Running slightly lower rebound for better ground tracking.

For smoother, flow trails:

  • Remove volume spacers for a more linear feel.
  • Use lighter compression and rebound settings.
  • Keep air pressure consistent with sag preferences.

These customizations help you unlock the full performance potential of the GRIP2 system.

Comparison with Other FOX Forks

Compared to the Fox 34 Performance or Rhythm models, the Factory GRIP2 features:

  • External HSC/LSC/HSR/LSR controls (Performance uses a simpler GRIP damper).
  • Lighter and more durable Kashima-coated stanchions.
  • Better heat management and mid-stroke support.

Versus the Fox 36 GRIP2, the 34 is lighter and more suited for trail riding, whereas the 36 excels in enduro applications with added stiffness.

Compatibility with Other Drivetrain and Cockpit Components

Ensure that the brake caliper, rotor size, and thru-axle standard match the 34 Float Factory fork specifications. This fork supports a 180mm post-mount brake without an adapter.

Handlebar and stem compatibility depend on the steerer diameter, which is standard tapered 1 1/8″ to 1.5″. Ensure proper headset cup installation for secure fitment.

For dropper post levers or remote lockouts (if converted), verify cable routing clearance near the fork crown and steer clear of potential interference.

FAQs

Q1: How do I know when to service my GRIP2 fork?
If you notice reduced small bump sensitivity, inconsistent rebound, or see dirty oil near the seals, it’s time for a service—typically every 30-50 hours of riding.

Q2: Can I convert the fork travel?
Yes, Fox offers air shaft kits to adjust travel in 10mm increments. However, this should be done by a qualified technician.

Q3: Why is my fork not using full travel?
You may have too many volume spacers or excessive HSC. Reduce these to allow more travel if needed.

Q4: What is the benefit of Kashima coating?
Kashima reduces friction and improves the longevity of the stanchions. It also adds a distinctive golden finish.

Q5: Can I use a coil spring in the Fox 34 Float GRIP2?
No, the 34 Float GRIP2 is an air-spring-only model. Coil conversion kits are not supported for this fork.

Q6: What rider weight is this fork suited for?
The air spring is adjustable for a wide weight range (approx. 120–250 lbs). Use the sag measurement to fine-tune based on body weight and ride style.