https://www.scheels.com/p/springfree-shifting-wheels/15774-SP0122/
The Springfree Trampoline Wheels make moving your trampoline around the yard easier than ever.
shifting wheelsspringfree
https://www.designboom.com/technology/shape-shifting-origami-wheels-hankook-seoul-harvard-engineering-04-15-2021/
in their natural state, the wheels are collapsed and small -- when squeezed horizontally, they fold up to their maximum diameter.
research teamshape shiftingorigami techniquesdevelopswheels