The Float 36 Rhythm eMTB fork from Fox is positioned as a performance-focused, budget-conscious suspension solution for aggressive trail and enduro riders—especially those on eMTBs. It features GRIP damper technology, robust chassis design, and eMTB-tuned internals, making it a highly relevant option for riders seeking more control and stiffness without stepping into the Factory or Performance Elite tiers. This guide covers installation, adjustment, compatibility, and more for the Float 36 Rhythm eMTB to help you decide whether it’s the right upgrade for your setup.
Installation Process for Float 36 Rhythm eMTB
Installing the Float 36 Rhythm eMTB is straightforward if your bike frame and headset are compatible. Begin by ensuring your frame accepts a 1.5″ tapered steerer and that your axle is Boost 110mm spacing. The Float 36 Rhythm supports a 29″ or 27.5″ wheel depending on the model version.
The steerer tube must be cut to length based on your stack height. Once cut, press-fit the crown race and insert the fork through the head tube. Secure the headset spacers, stem, and top cap. Torque everything according to Fox’s specifications.
Attach the front wheel using the quick-release style 15QR thru-axle. Be sure the axle threads in smoothly and fully compresses into the dropout shoulder. Improper axle fitment can cause creaks and potential damage under load.
For brake setup, the fork features a post-mount disc brake interface supporting up to a 203mm rotor natively. Adapter use is necessary for larger rotor sizes. Align the caliper after wheel installation to ensure precise disc-to-pad clearance.
Tools Required
- Star nut setter or compression plug installer
- Hacksaw or pipe cutter for steerer tube
- Crown race setter
- Torque wrench [paid link] with 4mm, 5mm, and 6mm hex bits
- Suspension grease and headset spacers
- 15mm thru-axle compatible wheel
- Shock pump (up to 150 psi)
Adjusting the Float 36 Rhythm for Optimal Performance
The Rhythm variant uses the Fox GRIP damper, a simplified cartridge with externally adjustable compression and rebound settings. For eMTB use, the spring curve is tailored to support heavier builds and higher trail speeds.
Begin by setting the air pressure to match your rider weight. Use Fox’s air pressure chart as a baseline, then fine-tune based on sag. Proper sag should sit between 20–25% of total fork travel.
Rebound adjustment is found at the bottom of the right fork leg. Dial in a slower rebound for rocky trails or high speeds to maintain contact with the ground. Conversely, faster rebound helps in smoother conditions or for lighter riders.
Compression is adjusted via the top dial on the right leg. The Rhythm’s GRIP damper provides a sweep dial from open to firm rather than discrete clicks. For climbing or tarmac transitions, turning the dial to the firmer end improves pedaling efficiency.
Routine Maintenance and Service Intervals
Fox recommends a 50-hour lower leg service to maintain the Float 36 Rhythm’s performance. This involves cleaning and re-greasing the wiper seals, checking bath oil levels, and inspecting bushings for wear.
At the 125-hour mark or annually, a full damper and air spring service is advised. This includes replacing the air spring seals, cleaning the damper, and inspecting internals for wear.
Wipe down the stanchions after every ride to prevent debris from damaging seals. Avoid high-pressure washers, as they can push water into sensitive areas, leading to corrosion and premature wear.
Troubleshooting Common Issues with the Float 36 Rhythm eMTB
One frequent issue is creaking under front-end load. This often results from an improperly torqued or contaminated steerer interface. Ensure headset components are clean and torqued to spec.
Another issue is inconsistent rebound, which may indicate damper oil contamination. If rebound changes mid-ride without user input, it’s time for a damper service.
Excessive travel use, even with correct sag, may mean low air pressure or worn negative spring seals. Inflate the fork slightly above spec and observe behavior; if the issue persists, inspect the air spring internals.
Customization and Tuning Options
Though the Rhythm lacks the high- and low-speed compression adjustability of Factory models, riders can still fine-tune ride quality. Fox volume spacers allow changes to the spring curve. Reducing spacers softens the mid-stroke, while adding spacers firms up bottom-out resistance.
For weight savings and style, you can replace the stock black stanchions with aftermarket Kashima-coated ones. However, this is more of a visual upgrade than performance unless combined with a full damper and air spring upgrade.
Some riders opt to retrofit the GRIP2 damper into the Rhythm chassis, although this voids warranties and requires precise internal compatibility checks.
Compatibility with Other Drivetrain and Frame Components
The Float 36 Rhythm eMTB is fully compatible with Boost 110 front hubs and post-mount brake calipers. Its design supports both SRAM and Shimano brake systems without modification.
Cable routing and hose guides accommodate eMTB layouts, and the fork’s robust crown can handle added weight from lights or GPS mounts commonly used on electric bikes.
The fork pairs well with a wide range of head angles, typically from 64° to 66°, often seen on enduro and trail eMTB frames. However, extremely slack setups may reduce small bump sensitivity and cornering agility.
Performance Comparison with Similar Forks
Compared to the Fox 36 Factory, the Rhythm trades out the GRIP2 damper and Kashima stanchions for more basic versions, resulting in a 300–400 gram weight increase. However, the Rhythm retains the same chassis stiffness, offering nearly identical ride confidence in rough terrain.
Against RockShox’s Yari RC or ZEB Select, the Float 36 Rhythm delivers more supple small bump compliance due to its floating axle design and advanced wiper seals.
If your budget allows for upgrades, the Performance Elite offers GRIP2 damper adjustability without the Kashima cost, acting as a halfway point between Rhythm and Factory models.
Is the Float 36 Rhythm eMTB Worth the Upgrade?
For eMTB riders seeking enhanced stiffness, better damping, and long-term durability, the Float 36 Rhythm offers impressive value. While it lacks some high-end adjustments, its factory-built chassis and eMTB-tuned spring make it ideal for aggressive terrain and loaded bikes.
Unless your riding demands ultra-fine damping control, this fork delivers 90% of the ride quality at nearly half the cost of top-tier models.
FAQs
1. Does the Float 36 Rhythm eMTB fit 27.5” wheels?
Yes, specific versions of the Float 36 Rhythm are compatible with both 27.5” and 29” wheels. Always verify the model specifications before purchasing.
2. Can I install a GRIP2 damper into the Rhythm fork?
Technically, yes—though this involves full disassembly and voids any Fox warranty. Only experienced users should consider this.
3. What’s the maximum rotor size supported?
The fork natively supports up to 203mm rotors. With adapters, some users fit 220mm rotors, though this is beyond Fox’s official recommendation.
4. How much does the Float 36 Rhythm weigh?
Depending on steerer cut and axle type, it weighs around 2250–2350 grams. It is heavier than Factory versions due to steel internals and standard stanchions.
5. Is this fork suitable for cross-country riding?
No. The chassis and damper are optimized for aggressive trail or enduro use, especially on eMTBs. It’s overbuilt for XC conditions.
6. How often should I service the fork?
Fox recommends lower leg maintenance every 50 hours and full internal service every 125 hours or annually, whichever comes first.