Qube 8 Ball Bearings are specifically designed for Roller Derby. Modeled of the classic Fafnir bearings from the 1970’s. The traditional design has 7 balls, the Qube 8 ball has an extra ball to more evenly distibute weight. For a true proformance this bearing will be you new favorite.
*7mm Bearings are only suitable for a select number of plates*