The wheels are made of hard rubber, not plastic (if that is the question). In our house, it rolls over oiled parquet floors without any problems. But they are not "parquet castors" with soft rubber, like you find on the parquet castors of office chairs. I hope that helps 😉 .

They are rubberised.

I don't know in db, but it is very very quiet. I have never had such a quiet hoover.

No, it is the Mile Complete C3 Series 120 Parquet PowerLine with additional parquet brush Article 12362291