ROCKMAN Trailer Tire Wheel Assembly ST175/80R13 6-Ply C 91M 5 Lug on 4.5″ PCD Silver Mod Rim ,SET 2. DURABLE: 7mm deep tread depth vs 5.6 mm of other cheap competitors, durable and longer mileage life; PERFORMANCE: 6 ply rated, load range C. Load Index:91. Speed rating M–up to 75mph; WHEEL DETAIL: 5 Lug on 4.5″ bolt pattern, offset: 0, style: Silver Mod ; SAFETY CERTIFIED: Meets or exceeds applicable DOT standards to provide dependable performance season after season for hauling cargo safely.; 0 DURABLE: 7mm deep tread depth vs 5.6 mm of other cheap competitors, durable and longer mileage life PERFORMANCE: 6 ply rated, load range C. Load Index:91. Speed rating M–up to 75mph WHEEL DETAIL: 5 Lug on 4.5″ bolt pattern, offset: 0, style: Silver Mod SAFETY CERTIFIED: Meets or exceeds applicable DOT standards to provide dependable performance season after season for hauling cargo safely. SAFETY CERTIFIED: Meets or exceeds applicable DOT standards to provide dependable performance season after season for hauling cargo safely