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MTB Suspension Sales, Service & Support

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 with regards to the remote forks and shocks. 

Most of the aftermarket forks and shocks from Fox are now configured in a 'Push to Unlock' configuration, aka - PTU. This means that the days of 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. The remote levers for 3 positions PTL from Fox or Scott are our fav's, depending on whether the user is controlling fork, shock or both via remote.

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 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!) 

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, the shock would need to be 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

     

    (Factory models 2016 onwards retain the 'OMAt' function when converting to remote)
     

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

    For 2018 Fox Factory Forks with remote from new: It cannot be converted back to 'crown-adjust'. (New damper internals or new damper needed) 

    For 2018 Fox Factory Forks with lever on crown: It can be converted to remote. Note - Tools required for the conversion. The result is a PTU or PTL 2-position remote. 

    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 2013-2018 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.