TOP PLATE AND YORK 1/4" COLD FORGED STEEL; 5/8"BOLTED KINGPIN;1/2" DIAMETER ZERK AXLE WITH LOCK NUT; Wheel DiaTread WidthLoad HeightSwivel RadiusPlate SizeBolt SizeCapacity Each(kg)4"2"5 5/83 9/164 1/2 ×43 5/8 ×2 5/8 OR 3×3140-450KG5"2"6 1/24 1/4150-570KG6"2"7 1/25190-570KG8"2"9 1/26 1/2220-570KG