#420 Offset Link Offset link for chain marked 420 for Pocket bikes, ATVs, dirtbikes and motorcycles. Pitch: 12.70 mm Roller Diameter: 7.77 mm Width Between Inner Plates: 6.25 mm Pin Diameter: 3.96 mm Pin Length: (L) 14.70 mm (Lc) 16.1 mm Inner Plate Depth: 12.00 mm Plate Thickness: 1.50 mm Ultimate Tensile Strength: 16.00/3636 kN/LB Average Tensile Strength: 18.1 kN Weight per meter: 0.55 Kg/m