The 3RACING Cero Big Bore Low Profile Absorber O Ring, M13 x 1.5, is specified to sit low in the shock stack for minimal interference with piston movement. It provides a reliable seal that supports consistent oil retention and damping repeatability under racing loads.
For tuners and race technicians, a correctly sized, low profile O ring reduces seal displacement and contributes to predictable shock response. Inspect O rings during each rebuild cycle and replace when elastomer degradation is evident to maintain setup consistency.
Designed for the Cero Big Bore family, the M13 x 1.5 geometry matches the intended shaft and cap interfaces. Apply a light coat of your damper oil to the O ring for smooth installation and check seating to avoid uneven compression that can cause leaks under high impact forces.