Gladiator 20575R15 ST 205/75R15 STEEL BELTED REINFORCED Trailer Truck Tire 6 Ply 6pr 15 Inch 15 " ST205 75R R15 Load Range C LRC inches brand new Gladiator Trailer tires ST 6 PR 15 inch in 15" 6 ply rating 15 " Load range G API Pegasus Achilles steel belted 1820/1610 SRW/DRW pounds per tire weight capacity.