Tire Size: 200x50 mm Sprocket: #25 chain, 55 tooth Sprocket Offset: 27 mm from the rim to the outside face of the sprocket Brake Type: Band brake Brake Drum Diameter: 80 mm Brake Drum Offset: 31 mm from the rim to the outside of the brake drum Bearings: 6200Z Bearing Inset (Sprocket Side): 13.7 mm Bearing Inset (Brake Drum Side): 17.2 mm