When selecting a hamster wheel, it is important to choose one that is appropriate for the size and activity level of the hamster. The wheel should be large enough for the hamster to run comfortably without arching its back, typically around 8-12 inches in diameter for most species of hamsters. The running surface should also be solid (without rungs) to prevent injuries, and the wheel should be securely attached to the enclosure to ensure stability.
It is important to note that while hamster wheels can provide many benefits, they should not be used excessively. Hamsters may run several kilometres each night, and excessive running can lead to injuries or fatigue. It is recommended to provide other forms of exercise and enrichment, such as tunnels, climbing structures, and toys, to help keep hamsters active and engaged.