bad knock on rear over the pot-holes

[davedew]

The back end of mine knocks when there is a sudden drop in the road surface, pot holes, coming off of speed bumps etc. I am running 225lb springs as well but only 3 or 4 clicks on the dampers.

I think the knocking on mine is when the wheel drops down, ie the shock fully extends as they do suffer with a lack of droop in the suspension.

Maybe yours is similar.