Carnegie Mellon reinvents the wheel with shape-shifting tech By Dan Elsom The Sun Published June 29, 2018 6:58am EDT | Updated June 29, 2018 11:37am EDT ...

Each wheel is capable of withstanding a load of 10 ± 2 kilonewtons, while the transformation from one shape to the other takes five seconds, at the speed of one meter (3.2 feet) per second.