Martin Wheel Dm412b-4c-i Trailer Tire And Wheel 4.80-12 Tire Size: 480-12 Load Range: B Tire Weight Rating: 780 Lbs. Max. Pressure: 60 PSI Bolt Configuration: 4 Lug 4" Center - See diagram for fitment Pre Mounted Bias Ply Tire On Steel Wheel Center Bore: 2.83"