2 way vs 3 way adjustable shocks
Gulf GT - the photos are of the 2 way adjustable Penskes. I have the 3 way versions. The adjustable portion of the shock is rebound (on end of shock shaft), high speed rebound & low speed rebound (both on reservoir). These are the 3 adjustments. The spring preload is also adjustable (on shock body) & that is what you may be thinking of. I guess then that could be the 4th adjustment (or in your case the 3rd). Thanks for posting the cool pics!
Ed
Gulf GT - the photos are of the 2 way adjustable Penskes. I have the 3 way versions. The adjustable portion of the shock is rebound (on end of shock shaft), high speed rebound & low speed rebound (both on reservoir). These are the 3 adjustments. The spring preload is also adjustable (on shock body) & that is what you may be thinking of. I guess then that could be the 4th adjustment (or in your case the 3rd). Thanks for posting the cool pics!
Ed