Secus Fork Air Spring Upgrade Kit - Fox & Rockshox Forks

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  • Regular price $470.00
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Vorsprung Secus 

 

For the first time, we created an air spring with a truly better spring rate, everywhere in the travel, than a coil. The Secus upgrade delivers the first and only air spring system to really come indistinguishably close to the linear spring rate of a coil fork for the entire first 2/3rds of its travel, with the advantage of a gentle end stroke progression to prevent bottoming without the “wall of force” harshness that excessively progressive springs create.

 

Secus Advantages:

  • An enlarged negative air spring chamber delivers a soft, supple initial stroke for ultimate small bump compliance (yes, even compared to the Luftkappe)
  • Proprietary Midstroke Support Valve improves predictability and support beyond the sag point
  • Reduced lower leg pneumatic ramp means better scalability of the air spring, particularly for light riders who previously struggled to use full travel
  • Plush and predictable like a coil, bottomless like an air spring
  • Allows full use of travel in both directions - fully extends to topout without any quibbles (including on Debonair B1 air springs) and fully compresses without excessive ramp
  • Allows more lower leg bath oil to be used for superior lubrication
  • Considerably lighter than coil conversions - adds approximately 130g
  • Simple setup - inflate fork, bounce on it a few times, press MSV charge button, go ride
  • Compatible with OEM volume spacers for end-stroke progression adjustment
  • Compatible with other aftermarket top-cap systems such as DSD Runt and MRP Ramp Control
  • Lower compression ratios mean a more consistent spring rate
  • Transferrable between any Secus-compatible forks with only a footstud to change at most
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    Three Stages of Control

    By independently optimising the beginning, middle and end portions of the stroke, the Secus gives you the linear-to-progressive spring rate that coil springs and traditional air springs alike wish they had. 

     

     

    Initial stroke - enlarged negative air spring chamber delivers a soft, supple initial stroke for ultimate small bump compliance

    Midstroke - where traditional air spring rates drop off in the midstroke, our proprietary Midstroke Support Valve technology boosts the midstroke spring rate to maintain linearity, for support, predictability, ride height and compliance

    End stroke - enlarged lower leg volume reduces overall progression even at higher pressures and allows for a wider range of end-stroke ramp options to be utilised with standard fork volume spacers.

     

    Secus Compatablity 

     

    Fork Year & Specification Secus Variant
    Fox 32 2018+ (unless footnut on spring side is recessed) Fox A1
    Fox 34 2018+ (unless footnut on spring side is recessed) Fox A1
    Fox 36 2018+  Fox A1
    Fox 38 2021+ Fox A2
    Fox 40 Coming soon
    Fox 32 StepCast  Not Compatible
    Fox 34 StepCast Not Compatible
    Marzocchi Z1 2019+ Fox A1
    Rockshox Pike / Revelation 

    2021 coming soon

    2019-20 compatible

    2014-18 Pike requires 2019-20 (B1/B2) Debonair Airshaft update to be compatible

    Note: C1 Debonair update (MY2021) not compatible - use B1/B2 sealhead or air shaft assembly.
    Rockshox A2
    Rockshox Lyrik / Yari

    2019-21 compatible

    2016-18 requires 2019-20 (B1/B2) Debonair Airshaft update to be compatible

    Note: C1 Debonair update (MY2021) not compatible - use B1/B2 sealhead or air shaft assembly.
    Rockshox A2
    Rockshox Zeb 2021+ Rockshox A2
    Rockshox Boxxer 2019+ Rockshox A2