The Fox 36 E-MTB Factory GRIP2 suspension fork is designed to provide outstanding performance for e-mountain bikes, offering enhanced stability and control. This high-end fork features the GRIP2 damper, which is known for its adjustable rebound, compression, and high-speed compression settings. Proper maintenance is essential to ensure that the fork performs optimally, maintains longevity, and provides a smooth, controlled ride. This guide will walk you through the installation, adjustment, and maintenance of your 36 E-MTB Factory GRIP2, as well as troubleshooting common setup issues, customization tips, and compatibility considerations.
Tools Required
- 5mm, 6mm, and 8mm Allen wrenches [paid link]
- Fox-approved suspension fluid
- Suspension grease
- Torque wrench [paid link]
- 10mm and 14mm socket wrenches
- Fork seal press tool
- Shock pump
- Bleed kit [paid link] (for oil damper)
- Soft brush or cleaning cloth
- Rags
- Isopropyl alcohol
- Small flathead screwdriver
Installation and Setup
Proper installation of the Fox 36 E-MTB Factory GRIP2 is critical for ensuring that it performs optimally. Follow these steps for a smooth installation process:
Step 1: Install the Fork into the Headset
Before installing the fork, make sure the headset is properly installed on your e-mountain bike. Remove the old fork and carefully slide the 36 E-MTB Factory GRIP2 into the headset. Ensure the steerer tube is cut to the correct length, leaving enough space for the top cap and the stem.
Step 2: Attach the Stem and Handlebar
Once the fork is securely in place, attach the stem to the steerer tube. Use your 5mm Allen wrench [paid link] to tighten the stem bolts, ensuring that the bolts are evenly torqued. Once the stem is in place, attach the handlebar to the stem and tighten the bolts, again ensuring proper torque to avoid damaging the components.
Step 3: Install the Brake Mounts and Wheel
Install the necessary brake mounts for your e-mountain bike and attach the front wheel to the fork. Ensure the wheel is properly centered and that the brake rotor is aligned with the caliper. Use a torque wrench [paid link] to ensure the axle is tightened to the recommended settings.
Step 4: Set the Sag and Initial Air Pressure
Use a shock pump to inflate the air spring to your desired pressure. To set the correct sag, you need to sit on your bike and compress the suspension. The recommended sag for the 36 E-MTB Factory GRIP2 is typically around 20-25% of the total fork travel. Adjust the air pressure as needed to achieve this range.
Adjustment and Tuning
Rebound Adjustment
The GRIP2 damper features a rebound adjustment knob, which controls the rate at which the fork returns to its original position after compression. To adjust the rebound:
- Turn the knob counterclockwise to slow down the rebound.
- Turn it clockwise to speed up the rebound.
It’s important to find the right balance. Too slow of a rebound can cause the fork to feel sluggish, while too fast can lead to a bouncy ride. Adjust in small increments and test ride to find the optimal setting for your riding style and conditions.
Compression Adjustment
The 36 E-MTB Factory GRIP2 fork provides separate high-speed and low-speed compression adjustments, giving you greater control over how the fork responds to different terrains.
- Low-Speed Compression: Use the low-speed compression dial to adjust how the fork responds to small bumps and trail chatter. A stiffer setting provides more support, while a softer setting offers a more plush feel.
- High-Speed Compression: This dial helps control the fork’s behavior under more aggressive impacts like drops or large hits. A firmer setting prevents bottoming out, while a softer setting offers more plushness on rough terrain.
Start with a mid-range setting and adjust based on your riding preferences and terrain conditions. It’s crucial to find the correct balance, as improper settings can affect both comfort and performance.
Volume Spacers
The 36 E-MTB Factory GRIP2 uses internal volume spacers to adjust the air spring curve. Adding spacers makes the fork ramp up more progressively towards the end of its travel, providing better bottom-out resistance. Removing spacers gives the fork a more linear feel.
Experiment with adding or removing volume spacers based on your riding style. For aggressive riders or those who frequently ride on rough trails, increasing the number of spacers can improve bottom-out resistance.
Regular Maintenance
Cleaning the Fork
Cleaning your fork after each ride is crucial to maintaining its performance and longevity. Use a soft brush or cleaning cloth to wipe down the fork’s stanchions, removing dirt, mud, and debris. Make sure not to use harsh chemicals or abrasives, as these can damage the fork’s finish. Use a rag soaked in isopropyl alcohol to clean the stanchions for a deeper clean, removing oils and grime.
Lubing the Seals
Lubricating the fork’s seals is essential for preventing wear and maintaining smooth operation. Apply suspension grease around the seals and the stanchions after cleaning the fork. This reduces friction and helps extend the life of the fork.
Inspecting the Seals
Check the fork seals for any signs of wear or damage. If you notice oil leaking from the seals or if the fork feels rough during compression, it may be time to replace the seals. Use a Fox-approved fork seal press tool to replace the seals. Be sure to clean the seal area thoroughly before installing new ones.
Air Spring Maintenance
Over time, the air spring can lose pressure, leading to a decrease in performance. Regularly check the air pressure in the air spring and adjust it based on your weight and riding style. If you notice a decrease in air pressure, inspect the air valve and the seals for leaks.
Troubleshooting Common Issues
Fork Bottoming Out
If your 36 E-MTB Factory GRIP2 fork is bottoming out frequently, there are several things to check:
- Air Pressure: Ensure the air pressure is set correctly for your weight and the fork’s recommended sag. Increase the air pressure if needed.
- Compression Settings: Adjust the high-speed and low-speed compression settings to firm up the fork’s response.
- Volume Spacers: Adding more volume spacers can help reduce bottom-out by making the fork’s spring curve progressively stiffer.
Stiff or Unresponsive Fork
A fork that feels stiff or unresponsive may be a result of too high of a rebound setting or a lack of lubrication. Adjust the rebound setting and inspect the seals for any damage or wear. Lubricating the seals and stanchions can also help restore smooth performance.
Customization and Optimization
The Fox 36 E-MTB Factory GRIP2 fork offers plenty of opportunities for customization. Riders can tweak the air spring settings, adjust compression and rebound to suit their preferences, and experiment with different volume spacer configurations. For maximum performance, consider customizing the fork based on the type of terrain you frequent. Whether you’re riding aggressive descents or tackling technical trails, fine-tuning the suspension to your needs will improve both comfort and control.
Compatibility with Other Drivetrain Components
The Fox 36 E-MTB Factory GRIP2 is designed to work seamlessly with modern e-mountain bike drivetrains, including 12-speed systems. However, compatibility with other components, such as the front brake caliper or headset, must be ensured. Always verify the fork’s specifications with your bike’s manufacturer or a bike shop to make sure everything fits correctly.
For the best performance, ensure that your drivetrain components are properly installed and maintained, as poorly tuned components can affect how the suspension fork performs.