Sonar Aura Wheels are affordable indoor wheels that can be used for derby or jamming around the rink. They utilize a urethane tire that has a reliable and predictable grip. The nylon white spoke hubs are lightweight, responsive, and provide an impressively smooth roll.  At 38mm wide, Auras have really clean edges that excel for roller derby and their 59mm height makes them quick to accelerate and easy to control.  Sonar Aura wheels offer good indoor performance at a nice affordable price.