The River Wheel Co. Blue On Blue 9 Spoke Glide. Clean Blue like the River. Featuring BUFF Core Technology to reduce dehubbing. All River Wheels come with bearing removal slots for taking bearings out with ease. These wheels come with High Quality River Flash Flood Bearings Pre-installed. 110 MM Diameter Wheel. 8.65 oz Per Wheel With Bearing Installed. Anodized 6061 T-6 Aluminum Core for Durability. Glide Urethane Formula for Smoothness. 100% Made In the California.