Our mounts loose 1 1/8 inch of ground clearance The reason why is that we want to tie to both sides of the frame of the bike, doing this requires passing under the bikes frame. The mount is made from one inch square tubing and clamped on using a clamp that is 1/8 inch thick. The triple tree's which moves the front wheel forward for lighter steering also account for about an inch of ground clearence loss. We often put stiffer springs in the front end of the bikes when we do the tree's to take out the sag in the forks. The original owner of the Ural cargo sidecar did not have us do this.