The Roll-Line Speed Race Abec 9 Bearings – 7mm and 8mm are designed for high performance and represent the best in quality for roller skating. The Abec 9 Bearings are suitable for all models of plates with a 7mm or 8mm axle. The Speed Race Abec 9 are a favorable choice of bearings for an advance skater.
Be sure you identify which size Axles you have and which size (7mm or 8mm) Bearings are needed.