not really sure what you mean by geometry change? if you read my 1st post i stated that i did not change the geometry at all, i simply moved the entire pro link up by 1.5" and since the pro link has roughly a 2-1 leverage ratio, a 1.5" vertical move of the pro link resulted in about 2.5" lowering of the rear wheel. and i know the geometry was not changed because when i removed the spring and had just the shock attached, the suspension travel at the wheel was still exactly 5.8" , as it was when i measured it stock, 5.8". i might have to take another pic to explain better but since the pro link uses a long link piece to attach to the swing arm. moving the pro link up by 1.5" has the same effect as lengthening this piece: and i moved the pro-link up at both ends, on the frame and at the shock.