In-line skate wheel  is the Usually made of polyurethane or other rubber, these wheels were originally designed for in-line skates, yet used with wheeled luggage pieces, allow for a wider base and smooth manuverability.

Other definition:
In-line skate wheel is the Usually made of polyurethane or other rubber, these wheels were originally designed for in-line skates, yet used with wheeled luggage pieces, allow for a wider base and smooth manuverability.