After hauling thru previous posts it looks as though these shocks were not interchangeable. I have measured them and all seems the same apart from the length. 302mm for the MC21 versus 284mm for the MC18. Is this the only problem?

On the face of it adding more ride height to the MC18 is a good thing but does 18mm at the shock simply push it too far? Or does it end up fouling the frame or linkage.

I guess if I swap to a 17inch rear the whole thing might balance out somehow.

Any thoughts?