The Fox 36 Factory GRIP2 suspension fork is a top-tier offering built for aggressive trail and enduro riders demanding maximum performance, adjustability, and durability. This fork is designed to deliver precise control and plush suspension feel over demanding terrain, incorporating the GRIP2 damper and advanced chassis design. In this guide, we’ll cover its installation, tuning, troubleshooting, maintenance, customization potential, compatibility, and a comparison to similar models in Fox’s lineup.
Tools Required
- 5mm and 6mm Allen wrenches [paid link]
- Crown race setter
- Torque wrench [paid link] (Nm scale)
- Star nut setter or compression plug tool
- Suspension pump (300 psi capacity)
- Isopropyl alcohol and clean rags
- Caliper or ruler for measuring travel
- Fox oil and grease kit (for maintenance)
Installation of the Fox 36 Factory GRIP2 Fork
Installing the Fox 36 Factory GRIP2 requires precision and the correct tools to avoid damage to the fork or your bike’s head tube.
The steer tube comes uncut, so measure your desired stack height with spacers before trimming. Use a fine-toothed saw and guide block for an accurate cut. After cutting, install the star nut (or compression plug for carbon steerers) using a proper setter. Apply a thin layer of grease to the steer tube and insert it into the head tube.
Align the stem and torque the headset cap bolt to eliminate play. Then torque the stem clamp bolts to manufacturer specifications, typically between 5-6 Nm.
Finally, install the front wheel using the floating axle system. Tighten the axle with the pinch bolt system, ensuring the axle is fully seated and preload is correct.
Adjusting the GRIP2 Damper and Air Spring
The GRIP2 damper offers four external adjustments: high- and low-speed compression, and high- and low-speed rebound. This makes the 36 Factory ideal for riders seeking high levels of tunability.
Begin by setting the air pressure based on your rider weight, referencing Fox’s setup chart. Add or remove volume spacers to fine-tune mid-stroke support and bottom-out resistance. Start with one or two fewer spacers than the max to maintain a balance between plushness and support.
Set rebound and compression using the clicks on the top and bottom knobs. A typical starting point is 8 clicks from closed on each setting. Fine-tune based on ride feel—more rebound damping for rougher terrain and increased high-speed compression for bigger impacts.
Routine Maintenance and Service Intervals
To maintain peak performance, Fox recommends 40-hour and 125-hour service intervals. The 40-hour lower leg service involves replacing bath oil, inspecting foam rings, and cleaning internal surfaces.
At 125 hours, the damper and air spring should be inspected and possibly overhauled. Use only Fox-specified suspension fluids and grease to maintain seal integrity and avoid contamination.
Regular maintenance also includes wiping the stanchions clean after each ride, checking for oil seepage, and inspecting for bushing play or creaking in the crown steerer interface.
Troubleshooting Common Issues
One common issue with the GRIP2 is inadequate small bump compliance. This is often due to excessive high-speed compression or over-pressurization. Reducing these values usually improves traction and comfort.
Another issue is harsh bottom-outs, which can be mitigated by adding volume spacers or increasing low-speed compression damping.
If there is a feeling of notchiness or binding, check the CSU (crown-steerer unit) and bushings. These can develop play over time or from poor installation. Replacing the CSU or performing a bushing sizing check might be necessary.
Customization and Performance Optimization
Custom tuning the GRIP2 fork allows experienced riders to personalize performance. Riders can replace volume spacers, tweak oil weights, or consult a suspension tuning shop for valving changes.
Fox’s GRIP2 damper is particularly receptive to changes in shim stacks, although this should only be handled by professionals. Riders often opt for different compression tunes based on local terrain—firmer for bike parks, more open for technical trail systems.
Air spring modifications using the Fox air volume spacers allow the fork to behave differently through the stroke. Fewer spacers make it more linear, while more spacers provide more ramp-up at the end of travel.
Compatibility with Other Drivetrain and Suspension Components
The 36 Factory GRIP2 is available in 29″ and 27.5″ wheel sizes with multiple offsets, ensuring wide compatibility with modern trail and enduro frames. It supports Boost spacing (110mm axle) and fits rotors up to 203mm without an adapter.
It pairs seamlessly with Fox rear shocks using the same damper technology for a balanced ride feel. While it’s optimized for aggressive trail/enduro use, its precision also suits aggressive downcountry setups.
Drivetrain compatibility is not a concern since the fork has no direct interaction, but consider fork offset and rake in relation to bike geometry and handling dynamics.
Comparison with Similar Fox Models
Compared to the Fox 34, the 36 Factory GRIP2 offers increased stiffness and better damping adjustability, making it superior for hard-charging riders. The 36’s 36mm stanchions provide a noticeable upgrade in chassis stiffness over the 34’s 34mm.
Versus the Fox 38, the 36 is slightly lighter and better suited for aggressive trail use, whereas the 38 is built for enduro racing and riders demanding even more stiffness.
The Factory trim level includes Kashima-coated stanchions for smoother operation and longer service life, giving it an edge over the Performance and Performance Elite models which lack the same coating or adjustability range.
FAQs
1. What is the recommended air pressure for the Fox 36 Factory GRIP2?
Refer to Fox’s rider weight chart, but generally, a 160 lb rider will start around 75-80 psi. Adjust based on sag and ride feel.
2. How often should I service my Fox 36 GRIP2 fork?
Perform a lower leg service every 40 hours and a full service (including damper and air spring) every 125 hours.
3. Can I upgrade a Performance or Performance Elite fork to a GRIP2 damper?
Yes, as long as the chassis dimensions match. However, it’s a complex process best handled by a certified technician.
4. Why does my fork feel harsh on small bumps?
Check high-speed compression settings and reduce pressure if necessary. Also, inspect stanchions and bushings for damage.
5. How many volume spacers can the 36 GRIP2 accommodate?
Typically, up to 5, but confirm with Fox’s documentation for your specific travel configuration.
6. Is the Fox 36 Factory GRIP2 overkill for trail riding?
Not necessarily. While built for aggressive riding, its tunability makes it suitable for demanding trail conditions if properly adjusted.
Conclusion
The Fox 36 Factory GRIP2 sets a high benchmark in suspension performance, combining precision tuning with robust construction. Its extensive adjustability, serviceable design, and compatibility with aggressive trail and enduro setups make it a worthy investment for serious riders. Whether you’re bombing technical descents or optimizing for trail flow, the GRIP2 damper ensures consistent and controlled suspension performance tailored to your ride.