All Air Shafts & Debonair Upgrade - Vorsprung Suspension

Secus Fork Air Spring Upgrade Kit for Fox and RockShox forks. 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.