wheels

The balls, used instead of wheels, on his omnidirectional battery-powered bike are the same type as used by circus acrobats and are self-balancing.

Where possible, his KR1 is built with mass-produced components - the wheels are the same as you would find on an electric scooter.

“I want to keep going until the wheels fall off or someone tells me no,” he said.

A charity is taking support services on the road with its "wheels of wellness" van ahead of the opening of a permanent site.

The wheels, which were patented in 2001, smoothly rotate a complete 360 degrees — modeled after the wheels on office chairs and hospital beds, so that they can move with ease under weight.