Diameter (inch) Thickness (mm) Weight /round disc £¨Kg£© Weight/notched disc£¨kg£© 14 3 2.53 2.33 4 3.37 3.12 16 3 3.1 2.85 4 4.12 3.82 18 3 4.15 3.85 4 5.54 5.19 5 6.92 6.52 20 3 5.15 4.8 4 6.87 6.47 5 8.67 8.22 6 10.3 9.8 22 4 8.12 7.67 5 10.15 9.65 6 12.2 11.6 24 4 9.78 9.28 5 12.2 11.6 6 14.67 14.02 7 17.12 16.42 26 5 14.66 14.01 6 17.6 16.9 7 20.53 19.78 8 23.4 22.6 28 6 20.8 20.05 7 24.26 23.46 8 27.73 26.83.
