D.I.D Single Speed Standard Chain Made in Japan (since 1933) Size: 1/2×1/8M Type: For single speed Pitch: 12.7 Roller Width: 3.45 Roller Outer Diameter (Φmm): 7.8 Number of Links: 116L Guaranteed Tensile Strength (kN): 8.14 Average Tensile Strength (kN [kgf]): 9.02[920]