It’s 17” from the bottom of the chassis to the ground. Yes I would change them - maybe not right now- I’ve been scratching my head about these stabilisers for a while- it’s a job to know how they will work till you have them. I was thinking about using caravan style ones on the front and mounting them inboard of the chassis-I use some scissor jack style stabilizers, and don't seem to have this problem. Are you opposed to changing the type of stabilizers that you use? What's the distance between the bottom of the frame, and the ground?