It's a wheel, it rotates and does not puncture.

The wheels don’t appear to be as durable as I expected with the wearing surface more like a foam than rubber. They would be great on a tarmac road or grass but they may not be that durable on a gravel surface like we have. They are also fairly slim so may not be that good on sand.

Just as I expected

Great

Lightweight, durable, never need a pump again and dare I say, good looking.