Herbies tube damper tightness

How tight should Herbies tube dampers be?  I just tried to put an UltraSonic Rx damper on a 6h30 tube and it was so tight I thought it was going to crush the tube.  Is it normal for them to feel very tight during installation?


@ketchup , that seems TOO tight. As @dill mentioned, you might want to stretch them slightly so that they can be rolled (but not easily) over the tube.

If you bought them new, instructions should be there. Open them up so the rings have hardly any deflection.

On the instructions it says that you can open them slightly, finger pressure.

6h30 is a sturdy tube, putting a damper may not be a good idea sonically.