[alpacassei]

I have the Criceti 15 for one of my hybrids, I use the 21cm wooden trixie wheel for her.

If the medium p@h wheel isnt fitting on the bars, you probably just need to move it higher so its not hitting against the base. If you have a good amount of substrate your hammie can reach the wheel still though thst wheel’s too small for most hams. If your ham cant run with s totally straight back you’ll need to upgrade to a 21-28cm Wheel depending on species.

I dont think you could attach a 28cm wheel to the bars without the base issue since its not as tall as some cages so its best to get a free standing wheel