The Sonar Ninja agile wheels are an affordable wheel intended for roller derby or indoor use. These wheels are described as light, fast, and aggressive. Most skaters prefer to use these wheels for roller derby, jam, speed, and session skating styles. The Sonar Ninjas have a solid aluminum hub and urethane wheel. Sonar claims these wheels "set a new standard for derby performance". You be the judge!
Features of the Sonar Ninja Wheels: