Issue link: http://www.e-digitaleditions.com/i/206043
Drive Chain Selection RPM Small Sprocket Quick Selector Chart Table 4: "K" Values for Calculating Chain Length (L) N-n 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 42 K 0.03 0.10 0.23 0.41 0.63 0.91 1.24 1.62 2.05 2.53 3.06 3.65 4.28 4.96 5.70 6.48 7.32 8.21 9.14 10.13 N-n 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 K 11.17 12.26 13.40 14.59 15.83 17.12 18.47 19.86 21.30 22.80 24.34 25.94 27.58 29.28 31.03 32.83 34.68 36.58 38.53 40.53 N-n 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 K 42.58 44.68 46.84 49.04 51.29 53.60 55.95 58.36 60.82 63.33 65.88 68.49 71.15 73.86 76.62 79.44 82.30 85.21 88.17 91.19 N-n 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 K 94.25 97.37 100.54 103.75 107.02 110.34 113.71 117.13 120.60 124.12 127.69 131.31 134.99 138.71 142.48 146.31 150.18 154.11 158.09 162.11 N-n 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 K 166.19 170.32 174.50 178.73 183.01 187.34 191.73 196.16 200.64 205.18 209.76 214.40 219.08 223.82 228.61 233.44 238.33 243.27 248.26 253.30 N-n 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 K 258.39 263.54 268.73 273.97 279.27 284.67 290.01 295.45 300.95 306.50 312.09 317.74 323.44 329.19 334.99 340.84 346.75 352.70 358.70 364.76 N-n 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 K 370.86 377.02 383.22 389.48 395.79 402.14 408.55 415.01 421.52 428.08 434.69 441.36 448.07 454.83 461.64 468.51 475.42 482.39 489.41 496.47