River Glides are smooth, fast and flowy. Hands down the smoothest wheel in the scooter industry. Featuring BUFF Core Technology which helps absorb impact, reduce de-hubbing and create a smoother ride. All River Wheels are manufactured with bearing removal slots for quick bearing replacement. All River wheels come with River Flash Flood Bearings pre-installed. The iconic 9-spoked anodized 6061 T-6 aluminum core creates a perfect balance of weight, strength and durability for a superior ride.