We bought the running wheel for our gerbils. On the very first day, the cork surface was already chewed up, and by the second day, it had fallen off because of that!
The wheel wobbles and you can clearly hear it when they run.
The wheel seems very basic.
We wouldn't buy it again!
The wheel wobbles a bit and isn’t really quiet, but the gerbils like it and use it. However, after just a few weeks the cork came loose and it can’t be fixed – so unfortunately I can’t really recommend it.