Hmm ok. Thanks for the input. What du you meen with the shaft? The shaft holding the piston inside the shock cylinder? Please explain more! Did some research the other day. With the Roadstar spring (at 13.8kg/mm I think) the R1 shock topped out in free sag but I did get the right amount of static sag. And this with no preload on the shock. Except that the Roadstar spring is longer then the R1 spring meaning it will have some preload when compressed and mounted on the shock. With the 19kg/mm spring on the Wilbers shock and almost no preload. I do get a few milimeters of free sag and the right amount of static sag. Could it only be that the R1 spring was to soft and that I did not noticed this from the beginning until I tried the Wilbers shock with the higher spring rate? Or is there also a difference in the shocks allowing a higher spring rate to be used on the wilbers?