One New Carlisle Sport Trail Replacement Tire (4.80 x 12). These Carlisle Trailer Tires are highway approved and meet U.S. Department of Transportation requirements. Their durable, wraparound tread provides confident cornering and a safe ride. Tread Style: Trailer Tread Pattern: Sport Trail Ply Ply: LRB MTD Diameter: 21.41 MTD Width: 5.40 Rim Width: 4.00 Load Range: 4 Max Load Rating/10 MPH: 840 Max PSI: 55 Tire Weight: 10.46 lbs PLEASE NOTE: Tire Reference Numbers ONLY: 519-3231, B1SB841, B1SB841-A, TRT70-0005