I needed a place to mount the back of my rain cover on the bike. I also needed a place to place my electric motor controller bag. I solved both problems with left over bike parts. This “rack” is made out of the top half of an unused fork welded together. I cut a 1 and 1/8″ hole in it to go over the bottom of my seat down tube. I also put a few weld nuts I had laying around on the top of it, just in case I need to mount something else securely to it.