The Fox 36 Factory GRIP2 suspension fork has established itself as a high-performance option in the enduro and aggressive trail riding categories. Known for its refined damping characteristics, excellent adjustability, and stiff chassis, the 36 Factory GRIP2 caters to riders who demand precise control and versatility. This guide explores the fork’s installation, adjustment, maintenance, and optimization, as well as its compatibility and comparison with similar models.
Tools Required
- Torque wrench [paid link] (with NM range suitable for fork bolts)
- Hex wrenches (typically 4mm, 5mm, and 6mm)
- Crown race setting tool
- Star nut setting tool (if not using a threaded headset)
- Suspension pump
- Fox suspension oil (specific weight recommended for GRIP2)
- Suspension service kit (dust wipers, seals, foam rings)
- Isopropyl alcohol and lint-free cloths
- Shock pump
Installation Procedure
Installing the Fox 36 Factory GRIP2 involves precise fitment and careful alignment to ensure optimal fork performance and safety.
First, the steerer tube must be cut to the correct length based on the rider’s frame and stem configuration. A crown race must be installed using a race setting tool to ensure a flush fit with the headset. The fork should then be inserted into the head tube, followed by installing the stem and headset spacers.
Torque specifications must be observed when tightening the stem bolts and headset preload. Lastly, the front wheel axle should be secured using Fox’s Kabolt-X or quick-release system, ensuring it is properly aligned to prevent binding or disc brake misalignment.
Adjusting the GRIP2 Damper Settings
The GRIP2 damper offers independent high-speed and low-speed compression and rebound adjustments, making it one of the most tunable dampers on the market.
Riders should begin with Fox’s recommended baseline settings based on rider weight and terrain. These can be found in the user manual or online tuning guide. The low-speed compression affects fork behavior under slow, rider-induced movements such as cornering or climbing. High-speed compression influences the fork’s reaction to fast impacts like roots and drops.
Rebound adjustment is split similarly into high-speed and low-speed, controlling the return speed of the fork in various impact scenarios. Fine-tuning should be done incrementally—typically one click at a time—to achieve balanced and predictable handling.
Regular Maintenance Schedule
To ensure optimal performance, Fox recommends routine inspection and periodic servicing of the 36 Factory GRIP2.
Lower leg services should be performed every 30 to 50 hours of riding. This includes replacing dust wipers, cleaning foam rings, and refreshing the bath oil. Every 125 hours or annually, a full damper and air spring service is advised. These intervals may vary depending on environmental conditions and rider weight.
Maintaining clean stanchions and seals after each ride can prolong service intervals and protect internal components. Use isopropyl alcohol and a lint-free cloth to wipe down exposed fork surfaces.
Troubleshooting Common Set-Up Issues
Some riders encounter issues when first dialing in the GRIP2 damper. Common symptoms include excessive harshness, too much diving under braking, or packing over repeated hits.
If the fork feels harsh or unresponsive, it may be over-pressurized or have too much compression damping. Reducing high-speed compression and checking air pressure with a shock pump can help resolve this. Diving during braking is often the result of insufficient low-speed compression or too little air pressure.
Packing down—when the fork fails to return fully between hits—can be corrected by reducing high-speed rebound damping. Rebound should be fast enough to return the fork before the next impact, but not so fast that it causes instability.
Customization and Performance Optimization
The 36 Factory GRIP2 offers a range of customization options for advanced riders. The air spring can be modified with volume spacers to tune progression. Adding spacers increases ramp-up for aggressive riding, while removing them provides a more linear feel suitable for lighter riders or smoother terrain.
Tuning rebound and compression settings based on riding discipline—such as adjusting for technical enduro versus fast flow trails—further enhances fork performance. Riders can also experiment with axle configurations (15QR vs. Kabolt-X) to alter stiffness and front-end feel.
For racers or experienced riders, third-party services offer custom damper tunes to match specific needs, but these should be performed by qualified suspension technicians.
Compatibility with Drivetrain and Frame Standards
The Fox 36 Factory GRIP2 is compatible with most modern mountain bike frames designed for 29″ or 27.5″ wheels, with boost spacing (110mm) and tapered head tubes. Travel options typically range from 150mm to 170mm, with some models supporting up to 180mm.
The fork accepts both 180mm and 203mm post-mount brake rotors and is compatible with all standard 1 1/8” to 1.5” tapered headsets. Tire clearance allows for widths up to 2.6” in 29er configurations, depending on rim width and tread profile.
It is not compatible with frames using straight steerer tubes or non-boost spacing without adapters.
Comparison with Similar Suspension Forks
When compared to the RockShox Lyrik Ultimate or Öhlins RXF36, the Fox 36 Factory GRIP2 offers more nuanced damper adjustability due to its independent compression and rebound circuits.
While the Lyrik is known for its plush initial stroke and lighter weight, the 36 GRIP2 stands out in mid-stroke support and high-speed stability. Öhlins models, on the other hand, are praised for small-bump compliance but lack the same global service network as Fox.
The Fox 36 is often favored by riders who prioritize precise tuning and consistent damping over weight savings. Its Kashima coating and robust chassis also add to its reputation for durability in harsh conditions.
FAQs
1. How often should I service my Fox 36 Factory GRIP2 fork?
Fox recommends a lower leg service every 30–50 hours and a full service every 125 hours or annually, whichever comes first.
2. Can I install the 36 GRIP2 on any mountain bike?
It fits most modern bikes with tapered head tubes and boost spacing. Always check travel compatibility with your frame.
3. What makes the GRIP2 damper better than GRIP or FIT4?
GRIP2 provides independent high- and low-speed damping control for both compression and rebound, offering more fine-tuned adjustability.
4. How can I reduce fork dive when braking?
Increase low-speed compression damping or add air pressure incrementally to improve support under braking forces.
5. What wheel sizes does the 36 Factory GRIP2 support?
It is available for 27.5″ and 29″ wheels, with appropriate offsets and travel lengths for each.
6. Is the 36 Factory GRIP2 suitable for cross-country riding?
Due to its weight and travel range, it is more suitable for enduro and aggressive trail riding than cross-country applications.
Conclusion
The Fox 36 Factory GRIP2 stands out as a premier suspension fork for aggressive trail and enduro riders seeking the highest level of performance and adjustability. Its precision damping, customization capabilities, and reliable chassis make it a strong contender for those demanding the best from their front suspension. Whether you’re a seasoned racer or a performance-focused weekend warrior, the 36 Factory GRIP2 offers the control and confidence required for the most challenging terrain.