Originally Posted by Mad About Drums
Just kidding... put some small pieces of rubber material above and below the hoop, it will compensate and secure the pedal more securely and act as a protection for the hoop at the same time, make sure it's some kind of "flexible" rubber, not too hard as it will slip and not too soft as it won't compensate the gap.
I agree, this will work perfectly. But before this, pedals usually have a nut on the clamp that allows you to lower the clamp still on the parallel. Have you tried lowering this to the right hoop size?