The Fox 36 Factory GRIP2 is a premium suspension fork built for aggressive trail and enduro riding. Equipped with the high-performance GRIP2 damper, it offers tunability and control that riders demand on technical terrain. To maintain peak performance, periodic inspection, cleaning, and servicing of the fork is essential. This guide offers expert-level instructions for installation, adjustment, troubleshooting, and maintenance of the Fox 36 Factory GRIP2.
Tools Required
- 3mm, 5mm, and 6mm hex wrenches
- Torque wrench [paid link]
- 10mm socket and ratchet
- Suspension pump
- Shock oil (Fox 20wt. Gold, Float Fluid)
- Clean rags and isopropyl alcohol
- Seal driver and pick tool
- Plastic syringe or oil bath tools
- Snap ring pliers
Installation Overview
Correct installation of the Fox 36 Factory GRIP2 fork ensures safety and optimal performance. Begin by confirming headset and steerer tube compatibility with your frame. The 36 GRIP2 uses a tapered steerer and 15x110mm Boost axle standard.
Before mounting, cut the steerer to length using a pipe cutter or saw guide. Ensure a smooth, flat surface to interface with the headset. After installing a crown race and star nut (if using a threaded top cap), insert the fork into the head tube. Assemble the headset according to the manufacturer’s torque specs.
Mount the front brake caliper and ensure hose routing clears all moving parts. Attach the front wheel using the Kabolt-X axle system or standard QR15 if applicable. Torque the axle and pinch bolts to spec—Fox recommends 19.7 Nm for the Kabolt-X.
Adjustment and Tuning
The 36 Factory GRIP2 features independent high- and low-speed compression and rebound adjustments, along with adjustable air spring pressure and volume.
Air Spring Setup:
Begin by determining the rider’s weight and referring to the Fox suspension setup chart. Using a suspension pump, inflate the fork to the recommended pressure, then sit on the bike to check sag (20-30% for trail use).
Rebound Tuning:
The red knob controls rebound. Use the lower adjuster for low-speed rebound and the upper for high-speed. Start from the middle of the adjustment range and fine-tune based on ride feel.
Compression Settings:
Blue knobs control compression. Low-speed compression (top knob) influences pedal bob and cornering support, while high-speed compression (underneath) adjusts harsh impact response. Set high-speed compression to a firmer setting for aggressive descents, and low-speed to suit terrain and personal preference.
Volume Spacers:
The air spring curve can be altered using volume spacers. Adding spacers increases progressiveness, ideal for bigger hits. Remove the top cap using a cassette tool and insert or remove spacers as needed. Fox recommends no more than five spacers for the 160mm travel version.
Routine Maintenance
Consistent cleaning and lubrication prevent internal wear and performance degradation. After every ride, wipe down the stanchions and inspect the dust wipers for contamination. Apply a small amount of Float Fluid or suspension lube to maintain seal condition.
Every 30 Hours:
- Remove lowers and clean inside tubes
- Replace foam rings and refresh bath oil (Fox 20wt. Gold, 40ml total)
- Inspect dust wipers for cracks or contamination
- Reinstall with fresh oil and torque lower bolts to 7.3 Nm
Every 100 Hours or Annually:
- Full air spring service
- GRIP2 damper inspection and oil refresh
- Replace seals if wear is present
- Perform pressure equalization after reassembly
Troubleshooting Common Issues
Several problems can occur if the fork is not properly maintained or adjusted. Common symptoms and solutions include:
Excessive Fork Dive:
- Increase air pressure or add volume spacers
- Increase low-speed compression damping
Harsh Top-Out Clunk:
- Check for excessive negative air pressure
- Inspect damper rebound settings or service air spring
Sticky or Non-Responsive Travel:
- Dirty or dry wiper seals
- Insufficient bath oil
- Contaminated foam rings
Oil Leaking from Seals:
- Damaged dust wipers or scratched stanchions
- Overfilled lowers
- Check lower bolts and crush washers for tightness
Performance Optimization
To enhance fork performance, fine-tune air pressure and damping settings based on trail type and riding style. For enduro racing, increase high-speed compression and rebound damping to reduce chassis movement. Trail riders may prefer a softer setup for comfort.
Consider upgrading with Kashima-coated stanchions if your fork uses a black anodized finish. While performance differences are subtle, the coating reduces friction and improves durability.
Install a bolt-on fender like the Fox XL Mud Guard to protect seals from debris. Keep brake calipers and rotors clean to avoid contaminating the fork with overspray or lube.
Compatibility with Other Components
The Fox 36 Factory GRIP2 is compatible with most modern trail and enduro frames with Boost spacing. It pairs well with Fox’s Float X and X2 rear shocks for balanced suspension characteristics. The GRIP2 damper integrates seamlessly with Shimano, SRAM, and TRP front brake calipers.
It supports rotor sizes from 180mm to 203mm using the appropriate post-mount adapters. Ensure fork offset matches your frame’s trail geometry for optimal handling.
Model Comparison
Compared to the Fox 36 Performance Elite, the Factory GRIP2 offers Kashima coating and the advanced GRIP2 damper with four-way adjustability. The Performance model uses the same chassis but includes a more basic damper with fewer tuning options.
Against the RockShox Lyrik Ultimate, the 36 GRIP2 is generally stiffer laterally and provides a broader range of damping adjustments. However, the Lyrik may feel slightly more supple off the top due to its DebonAir spring.
FAQs
What is the recommended service interval for the Fox 36 Factory GRIP2?
Fox recommends lower leg maintenance every 30 hours of ride time, and a full service including damper and air spring every 100 hours or annually.
Can I install the 36 GRIP2 on a non-Boost frame?
No. The 36 GRIP2 is designed for Boost spacing (15x110mm). Using adapters compromises safety and performance.
Is the GRIP2 damper user-serviceable?
While it is technically serviceable, Fox recommends servicing the GRIP2 damper only by trained technicians due to its complexity and need for precise bleed tools.
What is the maximum rotor size supported by the 36 Factory GRIP2?
It supports up to a 203mm rotor with the correct post-mount adapter.
How do I check sag on my Fox 36 fork?
Use a zip tie on the stanchion as an indicator. Sit in a neutral riding position and measure how far the fork compresses under your weight. Aim for 20-30% sag.
Can I upgrade a Performance model to GRIP2?
Yes, Fox offers GRIP2 upgrade kits. Installation should be done by a suspension service center due to the need for internal modifications.
Conclusion
Proper maintenance of the Fox 36 Factory GRIP2 ensures its long-term reliability and top-tier trail performance. By following the right procedures for setup, cleaning, and servicing, riders can enjoy precise control, plush travel, and improved confidence in all terrain.