The Fox 34 Float Factory GRIP2 is engineered for performance and precision on aggressive trail and all-mountain terrain. Its GRIP2 damper offers unparalleled adjustability, and its lightweight Float EVOL air spring enhances small bump sensitivity and overall ride quality. However, like any high-performance suspension fork, the 34 Float Factory GRIP2 requires careful installation, regular maintenance, and precise tuning to keep it operating at peak performance.
Tools Required:
- Torque wrench [paid link] with hex and Torx bits
- Suspension pump (high-pressure)
- Fox 20cc Float Fluid and 5wt Teflon-infused oil
- Clean microfiber cloths
- Pick or plastic scraper
- Syringe for oil measurement
- Fox-specific seal driver or socket tool for seal installs
- Allen keys [paid link] (2mm to 6mm)
- Suspension grease (slickoleum)
- Isopropyl alcohol (99%)
Installation Best Practices
Proper installation of the Fox 34 Float Factory GRIP2 is essential to ensure performance and safety. Begin by verifying compatibility with your frame and axle standard. The fork is designed for a 44mm rake, Boost 110mm spacing, and a 1.5″ tapered steerer tube.
Carefully insert the steerer tube into the headtube, ensuring headset bearings are properly greased and aligned. Use a torque wrench [paid link] to tighten the stem bolts evenly, adhering to the stem manufacturer’s torque settings. When installing the front wheel, make sure the 15x110mm thru-axle is clean, lubricated lightly, and torqued to 19.7 Nm.
Before riding, inflate the air spring using a shock pump. Refer to Fox’s air pressure chart for a base setting according to rider weight. Always equalize pressure between the positive and negative chambers by compressing the fork after each pump burst.
Adjusting the GRIP2 Damper
The GRIP2 damper is one of the most advanced on the market, featuring high- and low-speed compression and rebound adjustments. Begin by turning all dials fully clockwise to the closed position before backing out each to your desired base setting.
Low-Speed Compression (LSC): Controls mid-stroke support and resistance to rider input such as braking and pedaling. Start at 10 clicks out from fully closed.
High-Speed Compression (HSC): Impacts how the fork absorbs big hits or fast impacts. Set it around 6 clicks out to balance support and comfort.
Low-Speed Rebound (LSR): Adjust this to control recovery after slow impacts. A good starting point is 8 clicks out.
High-Speed Rebound (HSR): Fine-tunes the fork’s recovery from repeated or big hits. Begin with 4 clicks out and adjust based on trail feedback.
Always make adjustments one click at a time and test on familiar terrain to feel the impact of each change.
Routine Maintenance and Lubrication
To maintain consistent performance, follow a maintenance schedule based on hours of use. Every 30–40 hours, perform a lower leg service. This involves removing the lowers, replacing bath oil (20cc per leg), and inspecting foam rings and seals.
Clean the stanchions and dust wipers after every ride. Apply a small amount of Float Fluid to the wiper seals to improve lubrication and reduce stiction. For riders in wet or dusty environments, more frequent cleaning and lubrication are advisable.
At 100 hours, consider a full damper service including an oil replacement. This process requires damper removal, complete disassembly, and reassembly using Fox’s service procedures and tools. If unfamiliar, a professional service center is recommended.
Common Troubleshooting Issues
Harsh Ride or Inconsistent Stroke: This usually points to incorrect air pressure or lack of negative air chamber equalization. Deflate and re-inflate, compressing the fork to equalize chambers.
Fork Not Returning Smoothly: May indicate insufficient rebound damping or sticky seals. Increase rebound speed slightly and ensure seals are clean and properly lubricated.
Oil Leaks Around Seals: Typically a sign of worn wipers or overfilled lowers. Replace seals and refill bath oil to manufacturer specifications.
Clicking Sounds or Loose Feel: Check torque on the damper top cap, thru-axle, and headset. Inspect bushings for play.
Optimizing Performance for Your Riding Style
Advanced riders can further customize the GRIP2 fork using volume spacers. These spacers alter the air spring curve. Adding a spacer makes the fork ramp up more aggressively, ideal for aggressive riding or larger riders. Removing spacers creates a more linear stroke, better for lighter riders or smoother trails.
Start with the stock configuration (usually one or two spacers) and adjust in single increments. Use a digital caliper [paid link] to ensure proper insertion depth and air sleeve reassembly.
Fork sag is another performance metric. Set sag to 20–25% of travel for trail riding. This ensures a balanced ride feel between traction and support.
Compatibility with Drivetrain and Frame Standards
The Fox 34 Float Factory GRIP2 is designed for modern Boost-spaced bikes. It accepts 29-inch wheels and supports tire widths up to 2.6”. Ensure your frame accepts the 15x110mm axle and has a 44mm offset recommendation for optimal geometry balance.
Rotor compatibility extends to 180mm post-mount rotors without an adapter and up to 203mm with an appropriate adapter. This allows greater braking power for aggressive descending.
Ensure fork crown clearance with your frame’s downtube and confirm cable routing does not interfere with the adjuster knobs or fork arch.
Model Comparison: GRIP2 vs FIT4 and Performance Series
The GRIP2 damper distinguishes the 34 Float Factory from the FIT4 and Performance models. While FIT4 offers easier setup with fewer adjustment dials, it lacks the high-speed rebound control that advanced riders demand.
The Performance Series uses a black anodized stanchion rather than the Kashima coat found on Factory models. This results in slightly increased friction and reduced longevity in extreme conditions.
Riders seeking maximum tunability and durability will prefer the Factory GRIP2 version. However, if simplicity or cost is a priority, the FIT4 model offers excellent value.
Frequently Asked Questions
How often should I service the 34 Float Factory GRIP2 fork?
Fox recommends a lower leg service every 30–40 hours and a full damper service every 100–125 hours.
What air pressure should I use for my body weight?
Refer to Fox’s air pressure chart for your fork travel. As a general rule, start with 75–80 psi for a 150–160 lb rider.
Can I use the 34 GRIP2 with a 27.5” wheel?
No. This fork is specifically designed for 29” wheels and will not function correctly with smaller wheels.
What’s the benefit of the GRIP2 over FIT4?
GRIP2 offers four-way adjustability (high/low-speed rebound and compression), providing greater tuning range for advanced riders.
Can I replace the seals myself?
Yes, with the right tools and attention to detail, seal replacement is a manageable DIY task. Always use genuine Fox parts.
Why does my fork feel sticky on small bumps?
This can result from dry seals or low lubrication. Apply Float Fluid to the wipers and ensure the foam rings are properly soaked during service.
Conclusion
Maintaining your Fox 34 Float Factory GRIP2 fork ensures that its precision performance remains consistent over time. With routine upkeep, careful adjustment, and the occasional deep service, riders can enjoy the benefits of its tunable damper and supple air spring for seasons to come. Whether optimizing for race day or weekend rides, understanding your fork’s mechanics empowers better control and confidence on the trail.