DESCRIPTIONThe Revision Flex Hockey Wheels are here to revolutionize roller hockey, with the ability to customize your wheel setup to your preferences. Revision has developed the Flex wheel with different profiles on each side of the wheel: the white side focuses on speed and control, and the colored side focuses on grip and flex. Players can now configure their wheels to focus on a specific aspect of their game with a single wheel. With different configurations, players can set for maximum speed, maximum grip, ice-like seesaw, or 9 other wheel combinations. Revision's Flex technology uses an asymmetrical internal construction with its hollow, offset torus (white) that provides a stiffer and sharper edge that maximizes speed. The bike also features the asymmetrical colored Flex Ring Insert to give more flex and better grip to the opposite side. And on the outside, the Revision Flex uses a super-hard Flex PU tire to keep the wheel durable and maximize its performance.    Ideal Playing Surface: Sports FieldHardness Guidelines: 76A / 78A (firm) = 77kg and moreBearing Insert: Standard 608