This is going to be caused by the amount of rebound you have in your shocks and the weight over the rear. I currently have 46g under my shorty lipo and 15g either side of the motor. I have zero/minimal rebound in my rear shocks. The upper shock mounting is in the inside hole and lower in the middle hole with core rc blue springs. When the shock collar is wound all the way up, I can have as little as 12mm ride height if I want. This was also measured whilst I had 500cst oil in the rear shocks, with thinner oil I would suspect the rear to sit even lower.
HTH
