8mm Bore Bearing with 32mm Plastic Tire8mm x 32mm x 12mmSteel Ball Bearing with a Plastic tire Combined plastic tire with a 8mm inner diameter ball bearing, dimensions are 8x32x12Item: BT0832 Tire combined with a steel ball bearings Type: Tire combined with a steel ball bearings Standard: Metric Size: 8mm x 32mm x 12mm Inner diameter (Bore): 8mm Outer diameter: 32mm Tire Width: 12mm Inner Bearing Width: 7mm Tire Profile Radius: 8mm Quantity: One Bearing