8" Mini Bike Wheel with Rear Drum Brake. Fits: 1st Generation TrailMaster MB200 Mini Bikes Baja Warrior Mini Bikes Coleman CT200U-EX Mini Bikes Features: Comes with 6202 Bearings Hub Width: 7-9/16" Bearing to Bearing Rim Width: 5-1/4" Hub Hole Pattern: 3-1/8" Brake Drum: 4-1/4" Diameter Most common Tire size: 19x7-8.