Mission's Hi-Lo hockey wheels are designed for unique surfaces; a reasonably hard wheel that will hold up well on outdoor surfaces, and won't slide around. On sealed cement you may find the results not quite up to that of a softer wheel with a little more grip.

A high and low wheel set up in a skate enables you to gain advantage of higher acceleration from a standing start with some smaller wheels, and greater coasting ability with some larger wheels included. Some larger wheels included will also enable you to negotiate some rougher terrain. There are a number of combinations available that are unique to a specific need in a skate.