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Why the reb stack on WP Shocks is so soft compared to all other shocks?

With 0,25mm hi speed shims and 21mm clamp the stack is x times softer as a common KYB/ Showa stack!!

Opinions?

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It works on hard pack but is terrible in sand

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You are comparing apples to oranges.  There are many factors besides the shim stack itself that determine the overall damping rate.  The European rebound settings are typically a bit lighter than Japanese bikes, but the valving shims do not tell the whole story.  Look at the valving on a WP fork versus a KYB fork - you'll see the same sort of dramatic differences.

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Why the reb stack on WP Shocks is so soft compared to all other shocks?

With 0,25mm hi speed shims and 21mm clamp the stack is x times softer as a common KYB/ Showa stack!!

Opinions?

A few things to consider is the designs as stated. In regards to stack comparison In which I feel your alluding to, you have a 12mm id shims versus the 16mm id shims. Take into consideration the flex and leverage points will very between the two. ( 12mm versus the 16mm).  Naturally you can get into port sizes and shapes, Bleeds, shim overhangs, compression adjusters bladder- seperator pressures etc. needs to be considered

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so this is one thing which needs to be clarified now:
Does the ID of the shims make a difference when you clamp them on the same diameter?
If yes, in what way?

A few things to consider is the designs as stated. In regards to stack comparison In which I feel your alluding to, you have a 12mm id shims versus the 16mm id shims. Take into consideration the flex and leverage points will very betweden the two. ( 12mm versus the 16mm). 

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so this is one thing which needs to be clarified now:

Does the ID of the shims make a difference when you clamp them on the same diameter?

If yes, in what way?

In the case of all things being equal except the id of the shims, I would say no. But then again I might be wrong So I ran a couple stacks on the restackor. Everything was the same except the id of the shims( same stack, piston ) there was a difference in stiffnesses. I would assume this might be do the the amount of the shim cross section avalible from ID to OD between the two.

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there has to be a difference on stiffness if you compare shims with different id's eg 12 x 44 x .20 and 16 x 44 x .20

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