The Fox 34 Float Factory GRIP2 is a high-performance suspension fork designed for aggressive trail and all-mountain riders who demand precision, customization, and long-term reliability. In this technical guide, we’ll explore every critical aspect of this fork—installation, tuning, maintenance, performance optimization, compatibility, and more—to help riders extract the best from their setup.
Tools Required
- 5mm and 6mm hex keys [paid link]
- Torque wrench [paid link] (Nm scale)
- Suspension pump (accurate to 0.5 PSI)
- Fox 20wt Gold oil and Float Fluid
- Clean shop towels
- Isopropyl alcohol
- Crown race setting tool
- Calipers (for measuring travel spacers)
Installing the 34 Float Factory GRIP2 Fork
Installing the 34 Float Factory GRIP2 is a straightforward process for experienced mechanics. Begin by cutting the steerer tube to match your frame’s head tube and headset stack. Be sure to leave room for stem and spacers. Press the crown race firmly using the designated tool.
Mount the fork to the head tube, ensuring proper bearing preload when tightening the headset cap. Torque stem bolts to manufacturer specifications. Lastly, align the fork dropouts precisely with the front hub axle before tightening the axle bolt to 15 Nm.
This fork supports both 29″ and 27.5″ wheels depending on the model. Ensure that your frame has adequate clearance for the travel range you choose (120mm to 140mm options are available).
Adjusting GRIP2 Damping System
The GRIP2 damper offers external high-speed and low-speed compression, plus high-speed and low-speed rebound adjustments. For riders new to the system, this level of tuning allows exceptional control but requires a methodical approach.
Begin with Fox’s recommended settings for your weight. Adjust low-speed compression to manage body movement during pedaling and climbing. High-speed compression should be set to handle impacts from rocks and roots. For rebound, set low-speed to control fork extension during moderate trail features, and high-speed to fine-tune responsiveness on successive hits.
Each dial offers 8–16 clicks of adjustment. Always record your baseline settings before making changes. Adjust in 1–2 click increments and test ride to feel the difference.
Setting Sag and Air Pressure
Achieving correct sag is critical. Fox recommends 15–20% sag for the 34 Float Factory. Use a suspension pump and measuring guide at the sag o-ring to fine-tune air pressure.
Have the rider stand in full gear in a neutral position on the bike. Bounce slightly to overcome stiction, then measure sag. Adjust pressure accordingly. Record the final PSI for future reference.
Air volume spacers allow progressive ramp-up tuning. Riders who bottom out too easily can install additional spacers (max five). Reducing spacers will linearize the travel feel.
Routine Maintenance Procedures
Fox recommends servicing the lower leg every 30–50 hours of riding. This includes:
- Removing the lower legs using a 10mm socket.
- Draining used oil and cleaning inside with isopropyl alcohol.
- Reapplying Float Fluid to foam rings.
- Refilling 20ml of Fox 20wt Gold per leg before reassembly.
Full damper and air spring service intervals are every 125–200 hours. This task involves complete disassembly and requires factory-level tools and experience. For most users, sending the fork to an authorized service center is best.
Troubleshooting Common Setup Issues
Excessive stiction or poor small-bump compliance can often be traced to dirty seals or low lubrication. Start with a lower leg service.
Harsh bottoming may indicate too few volume spacers or too low air pressure. Inspect the fork travel and analyze the o-ring position post-ride.
Fork dive under braking often results from low low-speed compression settings or under-sprung air pressure. Increase air pressure slightly or add a click or two of compression damping.
Knocking or inconsistent rebound may be due to air spring migration or insufficient oil. If a service has been recently done, double-check oil levels and damper bleed quality.
Performance in Varied Trail Conditions
The 34 Float Factory GRIP2 excels in mid-travel trail scenarios. On rocky descents, the independent high-speed compression adjustment smooths chatter and prevents harsh hits. In tight, technical climbs, low-speed compression provides platform stability without compromising traction.
Stiff chassis construction improves steering accuracy without the harsh feel of stouter enduro forks. The Kashima coating reduces friction, resulting in a smooth stroke even in dusty or wet trail environments.
The fork maintains composure in berms and drops while remaining agile for quick transitions, making it ideal for riders prioritizing both playfulness and control.
Customizing Ride Feel
Beyond air pressure and damper tuning, riders can further personalize performance with:
- Custom volume spacers: Fine-tune ramp-up based on terrain.
- Different fork offsets: Available in 44mm and 51mm options depending on the model, affecting steering responsiveness.
- Aftermarket axle systems: Such as bolt-on or tool-free quick release for stiffness or convenience preferences.
- Grip2 damper upgrades (for lower-end models): Available for retrofitting and improving existing forks.
Each mod requires careful compatibility checks with your frame geometry and intended riding style.
Durability and Long-Term Reliability
Thanks to anodized internals, robust seals, and precise machining, the 34 Float Factory GRIP2 stands out for long-term use. When serviced as recommended, bushing play is negligible even after 2,000+ trail miles. The Kashima coating resists wear, and the air spring system maintains consistent performance over time.
Failures are rare, usually tied to extreme riding abuse or missed service intervals. Fox offers full spare parts support, making long-term ownership a viable option.
Compatibility with Other Drivetrain and Brake Systems
The 34 Float Factory GRIP2 fork is fully compatible with all standard 1-1/8” to 1.5” tapered head tubes and 15mm x 110mm Boost front hubs. It supports both 160mm and 180mm brake rotors via post-mount adapters.
It’s optimized for modern drivetrains with wide-range 1x setups. Cable routing accommodates both full-length housing and internal guides, making it suitable for all drivetrain styles.
Comparison with Similar Models
Fox 34 Performance Elite: Shares chassis with the Factory but lacks Kashima coating and GRIP2 damper. Slightly less tunable but lower in cost.
RockShox Pike Ultimate: Comparable in travel and intended use, but has a slightly more supple small bump feel. GRIP2 offers more external tuning than the Charger 3 damper.
Marzocchi Z2: Lower cost option with fewer adjustments and less advanced damping. Ideal for budget-conscious riders not needing precise tuning.
When it comes to maximum adjustability and long-term reliability, the Factory GRIP2 still leads its class.
Frequently Asked Questions
Is the Fox 34 Float Factory GRIP2 suitable for bikepacking?
Yes, its mid-weight construction and customizable damping make it versatile enough for loaded off-road adventures with consistent control.
How often should I service the fork?
Perform lower leg service every 30–50 hours and a full internal service every 125–200 hours, depending on terrain and riding conditions.
Can I use this fork with non-Boost hubs?
No, the fork requires a 15x110mm Boost front hub for proper fit and safety.
What volume spacers are included?
The fork typically ships with 1–2 volume spacers pre-installed. You can add or remove spacers to fine-tune ramp-up.
Is the GRIP2 damper difficult to tune?
It offers extensive tuning but is approachable with Fox’s setup guide. Riders can experiment safely within recommended settings.
What frame head tube sizes are compatible?
The steerer tube is tapered and fits frames with 1-1/8″ to 1.5″ tapered head tubes.
Conclusion
The Fox 34 Float Factory GRIP2 fork represents top-tier trail suspension engineering. With its GRIP2 damper, extensive tunability, and durable Kashima-coated chassis, it offers riders a responsive, long-lasting suspension solution that can be finely tailored to any terrain or riding style. Proper setup and routine maintenance are key to unlocking its full potential and ensuring years of consistent performance.