The Float 36 Rhythm eMTB from Fox is a suspension fork designed specifically to meet the demands of aggressive electric mountain biking. Built for strength, adjustability, and dependable performance, the Rhythm model delivers top-tier ride quality at a competitive price point. This article offers a detailed breakdown of how to install, adjust, and maintain the Float 36 Rhythm eMTB, along with insights on common setup issues, performance tuning, compatibility, and comparisons with similar models.
Tools Required
- Torque wrench [paid link] (with 4mm, 5mm, and 6mm hex bits)
- Suspension pump
- Crown race setting tool
- Grease and threadlocker
- Allen key set
- Caliper alignment tool (optional)
- Digital caliper [paid link] or ruler (for measuring sag and travel)
- Isopropyl alcohol and clean rags
Installation of the Float 36 Rhythm eMTB
Installing the Float 36 Rhythm eMTB fork requires careful attention to headset integration, steerer tube cutting, and brake alignment. Begin by ensuring compatibility with your frame’s head tube and axle standard.
First, press the crown race onto the steerer tube using the crown race tool. Once seated properly, insert the steerer through the headset. Measure and mark the appropriate steerer tube length—always consider any headset spacers and stem stack height. Cut the steerer cleanly with a pipe cutter or saw guide, then deburr and reinstall it into the frame.
Install the star nut or threaded insert, depending on your system. Apply a thin layer of grease to headset bearings before tightening the stem to the steerer. Torque all fasteners to the manufacturer’s specifications.
Align the disc brake caliper with the new fork lowers. It may require repositioning or adding spacers depending on rotor size. Finally, insert the front wheel and torque the axle appropriately, ensuring that the axle pinch bolts are evenly tightened.
Adjustment Guidelines for Optimal Performance
The Float 36 Rhythm eMTB features GRIP damper technology and an air spring designed for eMTB use, offering high stiffness and damping support. Riders can fine-tune air pressure, rebound, and compression to suit their terrain and riding style.
Start with setting the correct sag. Inflate the air spring to the rider’s weight recommendation provided on the fork’s leg chart. Aim for a sag of 15-20% of total travel for aggressive descending or 10-15% for trail riding.
Rebound damping adjustment is located at the lower leg. Begin in the middle of the dial’s range and adjust incrementally based on trail feedback. Faster rebound allows the fork to extend quickly over repeated hits, while slower rebound improves traction in technical terrain.
Low-speed compression is managed via a dial on the top of the damper side. Increase it for better mid-stroke support or reduce it for a more plush ride. There is no high-speed compression adjustment on the Rhythm, which simplifies tuning but limits high-speed customization.
Routine Maintenance Schedule
To keep the Float 36 Rhythm eMTB in peak condition, regular service intervals must be followed. Fox recommends a lower leg service every 50 riding hours and a damper rebuild every 125-200 hours.
Lower leg service includes removing the fork lowers, cleaning seals, replacing bath oil, and reinstalling with new crush washers. Use only Fox-approved oils and greases. Inspect foam rings and wipers for wear, and replace them if degraded.
For air spring maintenance, remove the top cap and inspect the air sleeve and seals. Regrease the main piston and O-rings. Be sure to re-torque all components and cycle the fork after reassembly to equalize pressure.
Troubleshooting Common Setup Issues
If the fork feels harsh or lacks travel, check for insufficient sag or over-pressurization. Use a digital caliper [paid link] to verify travel usage after compressions. A zip tie can help visualize travel range on the stanchion.
Inconsistent rebound can result from air migration between positive and negative chambers. To fix this, depressurize the fork and manually reset the equalization by compressing the fork fully before reinflation.
Brake rub or rotor alignment issues often arise after installation. Ensure that the brake mount is square to the rotor and check rotor trueness. Loosen the caliper, squeeze the brake lever, and re-torque to center the pads.
Performance Tuning and Customization
While the Float 36 Rhythm eMTB lacks high-end adjusters like HSC/LSC found on the Factory series, riders can still tailor the fork’s performance. Using volume spacers in the air spring, you can increase ramp-up and bottom-out resistance. Removing spacers creates a more linear feel for lighter or less aggressive riders.
The Rhythm’s GRIP damper is known for its simplicity and excellent small bump compliance. For riders seeking more aggressive compression behavior, Fox’s Performance Elite or Factory-level forks offer a path to upgrade without changing the entire setup.
Tire clearance, fender compatibility, and bolt-on accessory mounts are also factors to consider. The Rhythm supports up to 2.6-inch tires, which accommodates most modern eMTB configurations.
Compatibility with Drivetrain and Frame Components
The Float 36 Rhythm eMTB uses a standard 15x110mm Boost thru-axle, which is compatible with most modern eMTB wheelsets. The steerer tube is tapered (1 1/8″ to 1.5″), suitable for nearly all trail and enduro frames released in the last 5–7 years.
This fork is optimized for head angles between 63 and 66 degrees, making it suitable for long-travel eMTB frames. The recommended rotor size is 180–203mm, but always confirm caliper bracket compatibility with your frame and brakes.
The fork’s axle-to-crown length (approx. 572mm for 160mm travel) affects ride height and handling. Ensure the replacement fork doesn’t significantly alter your bike’s geometry.
Comparison with Similar Suspension Forks
When compared to the Fox 36 Performance Elite and Factory versions, the Rhythm is less adjustable but significantly more affordable. It offers the same chassis and air spring but uses the GRIP damper instead of the more tunable GRIP2. This makes it ideal for riders who prioritize durability and simplicity over micro-adjustments.
Versus RockShox Yari and ZEB models, the Rhythm stands out for its stiffer chassis and refined damping, although the Yari may offer slightly more tuning range at a similar price point. However, Fox’s extensive aftermarket support and longer service intervals often tip the scales in favor of the Rhythm for many users.
FAQs About the Float 36 Rhythm eMTB
1. How much travel does the Float 36 Rhythm eMTB support?
It typically supports 150mm to 170mm travel, depending on the specific model configuration and wheel size.
2. Can I upgrade the GRIP damper to GRIP2 in the Rhythm fork?
No, the Rhythm’s chassis is not compatible with the GRIP2 damper due to internal differences, including tube diameter and length.
3. What is the maximum tire size I can run with this fork?
The fork accommodates up to 2.6-inch wide tires, making it compatible with most modern eMTB tires.
4. How often should I service the fork?
Lower leg service is recommended every 50 hours of riding, and full damper service every 125–200 hours.
5. Is this fork suitable for bike park riding or enduro racing?
Yes, it’s designed for aggressive use, including enduro and park riding, although racers may prefer the Factory model for additional tuning options.
6. Does the Rhythm come with volume spacers installed?
Most models come with one or two spacers installed from the factory, but check your specific model before customizing air volume.
Conclusion
The Float 36 Rhythm eMTB from Fox is a well-engineered, robust fork tailored to the demands of modern electric mountain biking. With a strong chassis, dependable damper, and wide compatibility, it strikes a balance between cost and performance that appeals to both casual riders and seasoned trail enthusiasts. While it may not offer every adjustment found in higher-end models, its performance and durability make it a top contender in its class.