Ricta Wheel Dynamics 54mm Speedrings Wide 99a.Ricta Speedrings' give you the feel of a traditional wheel with the speed and reduced rolling resistance of a cored wheel. The unique core design puts urethane around the bearing bore like a non-cored wheel and the inner core design helps maintain shape integrity when landing tricks for quick rollaway.Ricta's Wide shape features a hard edge and inner conical for consistent lock-in with wide riding surface for predictable smooth slides. 54mm Speedrings Wide 99a Ricta Skateboard Wheels