2021 Fox Float 36 NA2 Air Shaft Assembly - The Lost Co. - Fox Racing Shox - 820-02-575-KIT - 0821973390536 - 130 -

2021+ Fox Float 36 NA2 Air Shaft Assembly

Regular price
Sale price
6+ in stock
Ships within USA only
Quantity must be 1 or more

If you're looking to increase or decrease the travel of your 2021 or newer Fox Float 36 fork, simply snag one of these air shafts in the travel which you'd like to set your fork to, and swap it into your fork! The new 2021+ Air Shaft boasts a larger negative air volume chamber compared to the previous generation.

  • Fits all 2021+ Fox 36 Factory Series, Performance Series Elite, and Performance Series forks.
  • Includes brand new seals pre-installed, plus a new foot nut and crush washer.
  • NOT BACKWARDS COMPATIBLE with older Fox 36 forks.

*NOT backwards compatible with older model years.

We have a super in-depth video on Fox lowers service below which shows step-by-step how to pull your fork apart and swap out your air shaft. When you click to view the video it will start at the air shaft removal/swap procedure. Start at the beginning to watch the entire procedure!

2021+ Fox NA2 Air Shaft FAQ

Which models of Fox forks does this air shaft fit?

The 2021+ Fox Float 36 NA2 Air Shaft Assembly fits all model-year 2021 and newer Fox 36 forks in Factory Series, Performance Series Elite, or Performance Series.

This air shaft is NOT backwards compatible with model-years previous to 2021. This is not an upgrade for previous forks, and it only fits in 2021 and newer models.

How do I properly install and lubricate this air shaft in my fork?

Below is the installation procedure we follow in our shop:

  • REMOVE THE AIR, remove the lower legs, and remove the current air spring.
  • Clean the inside of the air-side stanchion and lower legs like you normally would during a fork service.
  • On the new air shaft, carefully remove the upper piston seal, dip it in Fox 20wt Gold Oil, and reinstall it.
  • Place a dab of 20wt Gold on the top and bottom of the lower seal that slides on the shaft (base plate), and slide it back and forth to lubricate the lower seal.
  • Next, take a fingertip-sized dab of Slickoleum and dunk that finger into 20wt Gold Oil. Swab that mixture inside of the first few inches of the air-side stanchion. We do this about two times to accomodate for the 3cc's of factory recommended oil volume in the air chamber.
  • Install the new air shaft into the stanchion while depressing the air valve at the top of the stanchion to allow the air spring to slide in easily. The outer seal on the base plate wil now be lubricated when you insert the air shaft into the stanchion
  • Install the new snap ring, and you're all set. Reassemble the fork as you usually would during a normal fork service.

Will I need a new damper that matches the same length of travel as the new air shaft?

You do not need to pay any attention to your damper if you are decreasing your fork's travel, because the damper will just compress to accomodate for the reduced travel. Yes, you can even decrease your 180mm fork all the way down to 130mm and your damper will simply compress to the new travel without any negative effects.

However, if you are increasing the travel of your fork, then you need to check to ensure that you are not going above the maximum travel of your specific damper. Below is a list of the common dampers to the 2021+ Fox 36 chassis, along with their maximum travel according to the fork's wheel size:


Maximum Damper Travel (DO NOT EXCEED):

  • GRIP2 Damper Maximum Travel : 29" Fork = 170mm / 27.5" Fork = 180mm
  • GRIP Damper Maximum Travel : 29" Fork = 170mm / 27.5" Fork = 180mm
  • New 2020+ FIT4 Damper Maximum Travel : 29" Fork = 160mm / 27.5" Fork = 160mm

What is included with this air shaft?

The 2021+ Fox Float 36 NA2 Air Shaft Assembly includes a new air shaft, a new foot nut, a new crush washer, and all accompanying seals pre-installed. The air shaft is available in multiple travel options for you to choose from.