Product DescriptionThis sprocket adapter fits most of the newer Chinese bikes. Great for converting your mini bike or go-kart to the split sprockets for quick and easy gear ratio changes. This adapter is precision CNC machined. If there is any paint on your wheel you may have to sand the paint off for a tight fit!Made from 6061-T6 aluminumOD: 5.875″Center Hole: 1.580″Machined Shoulder: 4.562″Outside Hole pattern for sprocket: 5.250″ with 1/4-28 threaded holesWill fit the following mini bikes:TrailMaster MB200Baja Warrior MB160/MB200Baja DB30 Doodle BugMotoVox bikes with 6 mounting holesCT200UCT200UEXBT200XCT100UCC100XRB100This also has the 2-7/8″ standard pattern for most vintage wheels