Two stage crossovers have a similarity to split crossovers in spreading out the bend radius of the crossover shim shoulder. Valving Logic dyno testing of an rmz250 shock demonstrates performance of a two stage crossover.

Shim ReStackor analysis of the configuration shows the upper crossover gap closes first followed by closure of the lower crossover gap at shaft velocities near 37 in/sec.

The soft high speed stack used in the configuration produces little increase in damping force when the crossover gap closes.

Two stage crossover spreads out the crossover closure event