They are good, but not like the originals, which are very expensive at 220 euros. I have also tried the newfren, but these are better because they last longer without needing cleaning. However, after some kilometers, the shaking starts, and they need to be opened and sanded with sandpaper. The newfren start shaking after 200 kilometers, they glaze more easily and need cleaning. I also changed the bell, not just the centrifugal, and I put an original bell. The bell also needs roughening with a dremel to last longer without shaking. They're not like the originals, but...