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Fox Fork & Shock Remote Compatibility

Posted on February 08 2018

Today's blog is a slightly technical one just to help clear up what Fox have done for 2018-2021 with regards to the remote forks and shocks. 

 

The aftermarket 'remote specific' forks and shocks from Fox are now configured in a 'Push to Unlock' configuration, aka - PTU. They are 2-position PTU. This means that the days of easy backward compatibility at least for now are numbered. The traditional CTD (Climb Trail Descend), or more recently known as 'Open Medium Firm' forks are all a 3 position 'Push to Lock' aka PTL. From the early days of 2013 with the first CTD models, through to the 2017 range of FIT4 Performance and Factory level forks and shocks, the 3 positions have been universally understood and were configured as a 3position PTL for remote. 

 

Levers: 

  • For setup of any 3-position 'push to lock' system, the Scott Twinloc lever below works best.
  • For setup of any current 2-position 'Push to Unlock' system, use the Fox 2-pos lever. 
  • Note - Either levers work fine for just fork, or just shock. Ie, they do not require both to be connected. They both feature dual cable entry. 

Remote Compatibility:

 

For 2013-2017 Fox forks with FIT dampers, the conversion to (or from) remote was (and still is) relatively simple, involving just a remote specific top cap assembly that can easily be installed by the home mechanic. Grab a remote lever, topcap (and clocking tool) and away you would go! The remote compatibility of these models allowed for users to interchange between remote and 'crown adjust' as required, but also made it simpler for distributors and resellers. 

For user's with a 2013-2017 model fork or shock who are looking to upgrade to the 2018+ internals , there are often some compatibility issues to overcome. There's always a way of overcoming these challenges, however, it can often require extensive service work and parts. In order to convert an older remote fork or shock to match up to a newer 3position PTL or 2 Position PTU setup, it may mean a new upper compression damper section and rebuild for a fork, and or a full rebuild with a different adjuster cam for a shock. All thanks to a small change in the cable pull distance, direction and ratios. The last thing you want is a fork that locks when the shock unlocks! (we've seen it done, and it ain't pretty!) 

For user's with a 2018+ model fork or shock who are looking to upgrade to remote adjustment, both the fork and shock require major changes. The fork requires a remote specific damper (not just top-cap). The shock requires several internal parts, not just those visible at the adjuster eyelet area! 

For user's with a 2018+ model fork or shock who are looking to remove the remote adjustment (ie, convert to 'crown adjust'), both the fork and shock would require major changes. The fork requires a non-remote specific damper (not just top-cap). The shock requires several internal parts, not just those visible at the adjuster eyelet area! 

 

Example 1: 

You have a 2016 model remote actuated Fox fork, and you're looking at a new 2018+ model Fox rear shock. In order for this combination to work, the fork would need to be modified with a 2018+ 2-position PTU topcap assembly in this damper. This is an internal modification, not a simple 'bolt' on change. Then the result is a fork and shock that works together in a PTU 2 position configuration. (using this 2 position lever) 

 

Example 2: 

You have a 2018+ model remote actuated Fox fork, and you have a 2015 model Fox remote rear shock. In order for this combination to work, there are a couple of options.

Option1) The 2018+ fork can be swapped to a PTL topcap (from the PTU which is stock for 2018+, and you can then use the Scott 3-position lever to actuate fork and shock together.

Option2) The shock is modified with a 2018+ 2-position PTU adjuster cam inside the shock's adjuster eyelet. This is an internal modification, not a simple 'bolt' on change. Then the result is a fork and shock that works together in a PTU 2 position configuration. (using this 2 position lever) 

The timeline below shows the year models, and how they were configured. (PTL or PTU) Only Factory models listed (not GRIP)

Remote / crown adjust interchangeability for Fox Forks 32, 34 and some FIT4 36mm (from 2013 onwards) 
  • 2013 - 3-Position Crown Adjust CTD OR 3 Position Remote PTL.
  • 2014 - 3-Position Crown Adjust CTD OR 3 Position Remote PTL.
  • 2015 - 3-Position Crown Adjust CTD OR 3 Position Remote PTL.

 

    (Factory models 2013-2015 loose the 'Trail Adjust' function when converting to remote) 

     

    • 2016 - 3-Position Crown Adjust Open/Medium/Firm FIT4 with OMA OR 3 Position Remote PTL with OMA
    • 2017 - 3-Position Crown Adjust Open/Medium/Firm FIT4 with OMA OR 3 Position Remote PTL with OMA
    • 2018 - 3-Position Crown Adjust Open/Medium/Firm FIT4 with OMA
    • 2018 - Position Remote PTU with OMA
    • 2019 - Position Remote PTU with OMA
    • 2020 - Position Remote PTU with OMA
    • 2021 - Position Remote PTU with OMA

     

    Note: Factory models 2016 onwards with FIT4 retain the 'OMA' function when converting to remote. 
     

    OMA - Open Mode Adjust (Low-speed compression adjustment) Found in 'Performance Elite' or 'Factory' level forks and shocks.

     

     

     

    Topcaps:

     

     

    Whilst a lot of this may look confusing, to put it simply, Fox has moved from a 3-position PTL, to a 2-position PTU for remotes. Everything else stays relatively the same. At Cyclinic, we can modify any 2013-2020 fork or shock to operate as 3P PTL or 2P PTU in most cases, but the purpose of this blog is to outline that the ease of interchangeability like we used to know it, is not there anymore.  Moving forward into 2019 and beyond, the remote interchangeability will be clearer as the 2 position PTU becomes the norm. 

    Aiden.