The Fox Float 36 Rhythm eMTB fork is purpose-built for aggressive trail and enduro electric mountain biking. With its GRIP damper and robust 36mm stanchions, it provides excellent support and control on rough terrain. However, to ensure peak performance and longevity, regular maintenance, accurate setup, and occasional customization are critical. This guide walks through every technical detail you need to keep your Float 36 Rhythm in optimal condition at home.
Tools Required
- 3mm, 4mm, 5mm, and 6mm Allen keys [paid link]
- Torque wrench [paid link] with Nm scale
- Suspension pump
- Shock oil (Fox 20wt Gold)
- Isopropyl alcohol and clean lint-free cloth
- Seal driver (36mm-specific)
- Pick tool or plastic pry tools
- Fox fork oil volume chart (for reference)
- Work stand (optional but helpful)
Installation Process of the Float 36 Rhythm eMTB Fork
Before installation, confirm the steerer tube length and crown race compatibility with your headset. Slide the steerer into the head tube and install the crown race if needed. Ensure headset bearing preload is snug but not restrictive, then torque the stem bolts to specification.
Install the front wheel and ensure that the 15QR axle (15x110mm Boost) is seated correctly. Tighten the axle to the recommended 19 Nm. Finally, align the brake caliper and check for rotor rub before tightening caliper bolts.
Initial Setup and Adjustment Guidelines
Suspension tuning begins with setting sag. Use a suspension pump to adjust air pressure according to Fox’s rider weight chart. Compress the fork with your weight in a riding position and aim for 15–20% sag.
Adjust the GRIP damper dial on top of the right leg for compression control. Start with the middle setting, then fine-tune depending on your terrain—softer for rough, faster for smoother.
The rebound dial is on the bottom of the right leg. Begin from the fully closed position, then back off 5–7 clicks for balanced response. Test the settings in a real riding environment and adjust gradually.
Routine Maintenance Procedures
For optimal function, perform a basic clean and lubrication every 25 hours of ride time. This includes wiping down the stanchions, inspecting dust wipers for grime, and applying a few drops of fork oil.
Every 50 hours, conduct a lower leg service. Remove the lowers, clean the internals with isopropyl alcohol, and replace bath oil (40ml per leg of Fox 20wt Gold). Reinstall with new foam rings and seals if needed.
At 100-hour intervals, perform a full damper and air spring service. This should include oil replacement and a complete teardown to inspect internal wear. While possible at home, this requires precision and experience—many riders opt to send it to a service center.
Troubleshooting Common Set-up Issues
Harsh Compression Feel: If the fork feels rigid over small bumps, reduce air pressure slightly and open compression a few clicks.
Fork Not Returning Fully: Check for negative air chamber imbalance. Perform an air spring equalization by cycling the fork with the shock pump attached.
Excessive Oil Seepage: Dirty or worn dust seals often cause this. Clean and inspect for seal damage. Replace if oil continues leaking after a clean.
Unusual Noises: Popping or squishing noises can indicate low oil levels or air mixing into the damper. Service the damper and refill with specified oil volume.
Customization for Optimized Performance
Although the Float 36 Rhythm comes with a non-adjustable GRIP damper, performance can still be dialed in. Riders can install volume spacers to change air spring progression. Reducing spacers creates a more linear feel, ideal for lighter riders or smoother trails. Increasing spacers makes the fork more progressive, suitable for aggressive, bottom-out-prone descents.
Custom tuning of the rebound and compression via internal modifications is also possible, though it voids warranty and should be left to professionals.
Compatibility with Drivetrain and Frame Standards
The Float 36 Rhythm is designed for Boost-spaced eMTBs (15x110mm axle), tapered steerer tubes (1.5” to 1-1/8”), and 180mm post-mount brakes. Ensure your frame and front wheel meet these standards. The fork accepts 29” wheels with a maximum tire width of 2.6”, maintaining clearance for debris and mud.
Brake compatibility requires a minimum rotor size of 180mm. Fox’s axle system also demands hub end caps that interface properly with the floating axle system.
Comparing the Float 36 Rhythm to Similar Fork Models
Compared to the Float 36 Performance Elite and Factory series, the Rhythm is more budget-conscious but still trail-capable. The Rhythm uses a GRIP damper instead of the GRIP2, which limits fine-tuning but enhances simplicity.
Its chassis is identical in structure, offering the same stiffness and weight characteristics. However, Factory models offer Kashima-coated stanchions and more adjustable dampers, appealing to racers and tuning-focused riders.
For those seeking durability with low maintenance, the Rhythm offers tremendous value. Riders needing more control over suspension dynamics may look toward Performance Elite or Factory.
Frequently Asked Questions
1. How often should I service the Float 36 Rhythm eMTB fork?
Every 25 hours for basic maintenance, 50 hours for lower leg service, and 100 hours for full service.
2. Can I use any fork oil for servicing the Float 36 Rhythm?
No, use Fox 20wt Gold oil for bath oil and follow volume charts precisely.
3. Is the Float 36 Rhythm upgradeable to GRIP2 damper?
Technically possible, but not cost-effective. It requires swapping internal components, better suited for Factory forks.
4. Why is my fork making a squelching noise after long descents?
This usually indicates aerated oil in the damper. A full damper service is needed.
5. How many volume spacers come stock in the Float 36 Rhythm?
Generally, two are pre-installed, but this varies. Refer to Fox’s tuning guide for your travel length.
6. Can I use this fork on a regular (non-electric) mountain bike?
Yes, if your frame meets the axle spacing and steerer tube compatibility. However, the chassis is optimized for heavier eMTBs.
Conclusion
Maintaining your Fox Float 36 Rhythm eMTB fork at home is not only achievable but vital for performance and reliability. By adhering to a regular maintenance schedule, tuning the fork correctly, and understanding its unique features, you can enjoy a plush, controlled ride on any trail. This guide equips you with the knowledge and confidence to keep your fork running smoothly, mile after mile.