changing the dimention of the base link moved the robot upward from the ground

I have a mobile robot "husky" I have the following things in a urdf file: In the same urdf file I have this information related to the base link: 10 I changed in the stl file the dimension of the base_link there fore I have to change in the urdf file the following The problem is that the mobile robot now is flying by 1 meter above the ground. how can I change the dimension of the base_link and keep the mobile robot in the ground