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.
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.
|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
Note: C1 Debonair update (MY2021) not compatible - use B1/B2 sealhead or air shaft assembly.
|Rockshox Lyrik / Yari||
2016-18 requires 2019-20 (B1/B2) Debonair Airshaft update to be compatibleNote: C1 Debonair update (MY2021) not compatible - use B1/B2 sealhead or air shaft assembly.
|Rockshox Zeb||2021+||Rockshox A2|
|Rockshox Boxxer||2019+||Rockshox A2|