Powell Peralta Dragon Formula 97a Nano Cubic Skateboard Wheels97A Dragons are designed to roll over rough terrain while maintaining the grip and slide of traditional 99A and 101A wheels. Their optimized 97A hardness gives you a smoother ride on more surfaces without giving up the responsiveness and control needed for technical tricks letting you push your skating further anywhere you go. Speed: DF 97A's feature up to 20% higher rebound than standard hard wheels, giving you noticeably more speed in parks, bowls,