• 8mm Shaft Clamp
• 10mm Shaft Clamp (also works for air shaft service)
• FIT Damper Body Clamp
• Dust Wiper Seal Press Tool
• Lower Leg Shaft Driver
• Fox Float NA / NA2 Plastic Bullet Tool

This rebuild kit gives you the tools for both damper and air spring service. All other tools are considered standard, see the Essential Tools Page.

• 10mm Shaft Damper Seal Kit (ANSO)
• 8mm Shaft Damper Seal Kit (ANSO)
• Dust wiper sizes depend on fork model (32, 34, 36, 38)

Fox-branded damper kits are more expensive but include preassembled sealheads. ANSO kits require visual shaft inspection (8mm vs 10mm).

References

• Clamping Small Shafts
• Clamping Large Shafts
• Fox FIT Rebuild Manual
• Suspension Terms Explained

Pro Tips

• Use lots of Slickoleum or SRAM Butter with the plastic bullet tool.
• If the bladder collapses slightly after reassembly, it will return under pressure.
• For tuning beyond stock, consider the Vorsprung Fractive Kit.
• If compression is weak but rebound works, suspect a bad bleed or missing oil.
• Grease dust wipers and lower bushings generously with SRAM Butter.

Full Rebuild Procedure

Follow the same steps as the FIT4 Damper Rebuild. Key additions include:

• Replace dust wipers using the included press tool
• Clean and inspect air shaft; clamp 10mm shaft and use bullet tool to remove/reinstall NA2 sealhead
• Use the shaft driver to release lower legs cleanly

Bleed Summary

1. Open all adjusters (HSC, LSC, rebound)
2. Ensure compression needle sits in its hole
3. Clamp damper body, unscrew sealhead, drain oil
4. Refill halfway & squeeze bladder 5–10 minutes
5. Top off & reinstall sealhead to 8.5 Nm
6. Remove compression needle adjuster with pick + magnet
7. Bleed through the needle port while cycling shaft and squeezing bladder
8. Reinstall adjuster + retaining ring

Final Assembly

• Both rebound & compression should feel clearly damped
• Check air spring travel + bladder return
• Use 20wt Gold on air side lowers; 4wt on damper side if FIT
• Always use a 26–28mm chamferless socket

• Taper-cast forks (rare XC) may not be compatible with included driver
• Always depressurize air spring before opening
• Do not clamp logos or threads
• Clean all clamp zones with alcohol before clamping
• Do not open the base valve unless experienced or bladder is blown

Metal Bullet Upgrade: Buy real metal bullet tool

Disclaimer: DIY use only. See Terms of Service.