Penske Racing Shocks 7300 Series - Manual (Page 7)

General Valving Characteristics
The damping characteristics of your shock are determined by the compression and rebound valve stacks
located on the main piston.
The valve stacks are made up of a series of high quality shims, which are made to flex under the force of oil
flowing through the piston ports and then return to their original state.
The thickness of the individual shims determines the amount of damping force the shock will produce. By
changing the thickness of the individual shims, damping forces will be altered. For example, if you are running
an “A” compression valving, where all the shims in the stack are .006 thick and you replace them with a “B”
compression valving, which consists of all .008 thick shims, the compression damping will increase.
* When the shaft is moving very slowly oil passes through the bleed hole and/or shaft bleed, if there is one,
before it passes to the shims.
High Speed Low Speed* High Speed
Rebound Compression and Rebound Compression