K2 Skate Men's F.I.T. 84 Boa Inline Skates Original K2 Softboot Stability Plus cuff is the perfect blend of support where you need it, eliminating skate weight and offering versatility for a wide range of skaters Die Cast Aluminum frames are known for providing excellent power transfer and stability at speed Wheels/Bearings: 84mm, 80a/ILQ-18 Lacing System: Boa Closure System