When the package says it will fit 97% of bikes, what it means is, you will have to find a creative way to rig it 97% of the time. 3% of the time it will fit the first time with no issues. I ran into this problem when trying to mount fenders. The fenders cost me $35 and then I ended up spending another $20 on stainless hardware to get them to mount properly. I should also mention that I had to make clearance for disk brakes though, so I knew what I was getting into when I started the project.