• Cheap mtb tools by shockwave parts 3D printed in Canada
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  • Tools for DIY Rebuild kits at home. 3D printed quality parts made for home mechanics. Cheaper than metal parts. Shockwave Parts.
  • Tools for DIY Rebuild kits at home. 3D printed quality parts made for home mechanics. Cheaper than metal parts. Shockwave Parts.
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Shockwave Parts

Fox FIT4 Damper + Air Shaft Full Rebuild Toolkit (2016–2024)

Fox FIT4 Damper + Air Shaft Full Rebuild Toolkit (2016–2024)

$89.49 CAD
$89.49 CAD
Sale Sold out sorry :(
Shipping calculated at checkout.
What is your Fox fork model to send you the proper Dust Wiper Seal Installation Tool
Which Fork Lower Leg Shaft Driver Model you want?

 Fox FIT Forks Full 200h Air + Damper Rebuild Kit

Everything you need to fully service your Fox FIT fork, both damper and air spring. Covers all FIT-style dampers (FIT4, FIT RC2) from 2016–2024 across 32, 34, 36, and 38 forks. Just make sure you don't have a taper-cast lower (rare on XC forks).

Use Air Spring Seal kits, they are so cheap and the shipping is free because he ships them in letters! You will have to get the real fox kit for the damper sadly, I did not find any aftermarket ones.

What's Included:

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 for recommendations.

Seal Kit Info:

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

Warnings:
- Taper-cast forks (rare XC forks) may not be compatible with included driver
- Always depressurize air spring before opening the fork
- Do not clamp logos or threads, clean clamping zones with alcohol first
- Do not open the base valve unless you know what you're doing or the bladder is blown
Metal Bullet Tool Upgrade: Buy the real one on Amazon

 Pro Tips

  • Use lots of Slickoleum or SRAM Butter with the plastic bullet tool to avoid friction or damage.
  • If the bladder collapses slightly after reassembly, that’s normal, it rebounds under air pressure inside the fork.
  • If you're curious about tuning, consider the Vorsprung Fractive Kit.
  • If compression is weak but rebound works, suspect a poor bleed or missing oil.
  • Grease the Dust Wiper Seals inside and the lower leg bushings generously with SRAM Butter.

 Full Rebuild Procedure

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

  • Replace dust wipers using the included press tool (match size to your stanchion: 32–38mm)
  • Clean and inspect air shaft; clamp 10mm shaft and use bullet tool to remove and reinstall NA/NA2 negative sealhead
  • Use shaft driver to release lower legs cleanly, do not hammer directly on the shaft

 Bleed Summary

  1. Open all adjusters: LSC, HSC, and rebound or the bleed will fail
  2. Make sure the needle adjuster on the base valve is into it's hole.
  3. Clamp the damper body, unscrew sealhead, and drain oil completely
  4. Refill halfway, squeeze bladder repeatedly for 5–10 minutes
  5. Top off to brim, reinstall sealhead slowly, torque to 8.5Nm
  6. Invert and remove the compression needle adjuster using a pick + magnet
  7. Insert syringe or funnel (8mm tube), bleed through needle port while slowly cycling shaft and squeezing bladder
  8. When bubbles stop appearing, reinstall adjuster and retaining ring

✅ Final Assembly

  • Test rebound and compression, there should be clear damping feel
    • It will not come back like GRIP Dampers because it's not pressurized
  • Check air spring travel and bladder return
  • Reinstall fork lowers with 20wt Gold on air side, 4wt in damper side if FIT
  • Reinstall using 26-28mm chamferless socket and torque to spec
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