After us the animal dealer had mistakenly turned on a hamster wheel with only 16cm diameter I got sometime compassion for our golden hamsters. As a young animal which was still sufficient, when he was fully grown, it is Tierqälerei. In Goldhamster GU Related News (http://amzn.to/1aLeyxd) a wheel with 30cm diameter is recommended, so I ordered this from Trixie. Our hamsters had on the first day issue to run it and fell out more often. Was funny to watch. He then but quickly accustomed to it and runs like a madman in it. Opposite the old impeller is the great nice and quiet, you could even sleep in the same room. (Hamsters are nocturnal) That was not the case with the old, which was insanely loud and has rattled. Since our terrarium in the living room does not bother our Hamster us, the TV may remain turned down.
Before buying one should note that the terrarium / cage height should be at least 30-32 cm, otherwise the lid is not about. The mistake I make unfortunately, but we had to bring eh before a larger terrarium. The black front of the wheel is removable, easier to clean. Our hamster loses Always something in it. Small tip: Never work with scented detergents, which irritates the animals. I always sink with hot water and wipe afterwards thoroughly with a tea towel.
Conclusion: strong buy recommendation and a price of 7,99 currently also an absolute bargain!