The higher the front is pulled up, less wheelies, less trenching, gets up on top of snow faster. Reduces ski pressure as well. I set mine so that when sled is sitting flat on garage floor or ground, have a buddy lift rear of sled by rear bumper. Lower to the ground slowly, the front of rails ( flat surface not curve) are 1/2" to 3/4" from floor contact. When I get on sled full rail contacts then.