13 inch Galvanized Steel Spoke Trailer Wheel 5 X 4.5 and Bias Ply Trailer Tire Assembly Tire Size: 175/80D13 Load Range: C Tire Weight Rating: 1360 Lbs. Max. Pressure: 50 PSI Bolt Configuration: 5 Lug 4.5" Center - See diagram for fitment Pre Mounted Bias Ply Tire On Steel Wheel Center Bore: 3.19"