700c rear wheel, test non-drive-side spokes 2.0mm straight stainless steel parallel pair @ 90 degrees to valve hole clamp bike upside-down in rotary vise back of wheel sticks out over edge of workbench clamp rear brake lever with vise-grips tire inflated to 110 psi tie rope to midspan of lower spoke in parallel pair loop over upper spoke add 5-pound weights from 0 to 100 pounds rope greased over top spoke in hopes of reducing friction fat chance! main effect was probably helping ropes slide toward hub noticed rope sneaked off around 45 and 75 pounds weight added to rope, all weight lifted, then lowered gently to hang Park spoke tension gauge squeezed 3 times, left edge near spoke nipple weight of rope trivial at midspan, gap narrowed from ~75mm to ~31mm stupid lower spoke went the wrong way! showed little change, rope friction plus rim deformation? decimal points only generallly reliable just best estimate, obviously influenced by memory of previous estimate extrapolate Park chart to decimal values raw data convert park mark to spoke tension (squeeze) upper lower weight upper lower upper lower spoke spoke in spoke spoke spoke spoke gauge gauge pounds kgf kgf lbs lbs 21.5 20.0 0 80.5 68.0 177 150 21.9 20.0 5 84.1 68.0 185 150 22.0 19.2 10 85.0 63.2 187 139 22.0 19.1 15 85.0 62.6 187 138 22.5 19.0 20 90.0 62.0 198 136 22.9 18.8 25 94.0 60.8 207 134 23.2 18.5 30 97.4 59.0 214 130 23.6 18.2 35 102.2 57.2 225 126 23.9 18.1 40 105.8 56.6 233 125 24.7 18.0 45 116.8 56.0 257 123 24.9 17.9 50 119.6 55.4 263 122 24.9 18.1 55 119.6 56.6 263 125 25.1 18.2 60 122.6 57.2 270 126 25.0 18.4 65 121.0 59.0 266 130 25.7 19.0 70 132.2 62.0 291 136 25.9 19.1 75 135.4 62.6 298 138 26.1 19.3 80 138.9 63.8 306 140 26.2 19.5 85 140.8 65.0 310 143 26.2 19.5 90 140.8 65.0 310 143 26.8 19.5 95 152.2 65.0 335 143 26.9 20.2 100 154.1 69.6 339 153 gauge chart gauge chart mark kgf mark kgf estimate extrapolated 17 51 18 56 18.0 56 0.6 19 62 18.1 56.6 20 68 18.2 57.2 21 76 18.3 57.8 22 85 18.4 58.4 23 95 18.5 59.0 24 107 18.6 59.6 25 121 18.7 60.2 26 137 18.8 60.8 27 156 18.9 61.4 28 179 19.0 62 0.6 19.1 62.6 19.2 63.2 19.3 63.8 19.4 64.4 19.5 65.0 19.6 65.6 19.7 66.2 19.8 66.8 19.9 67.4 20.0 68 0.8 20.1 68.8 20.2 69.6 20.3 70.4 20.4 71.2 20.5 72.0 20.6 72.8 20.7 73.6 20.8 74.4 20.9 75.2 21.0 76 0.9 21.1 76.9 21.2 77.8 21.3 78.7 21.4 79.6 21.5 80.5 21.6 81.4 21.7 82.3 21.8 83.2 21.9 84.1 22.0 85 1 22.1 86.0 22.2 87.0 22.3 88.0 22.4 89.0 22.5 90.0 22.6 91.0 22.7 92.0 22.8 93.0 22.9 94.0 23.0 95 1.2 23.1 96.2 23.2 97.4 23.3 98.6 23.4 99.8 23.5 101.0 23.6 102.2 23.7 103.4 23.8 104.6 23.9 105.8 24.0 107 1.4 24.1 108.4 24.2 109.8 24.3 111.2 24.4 112.6 24.5 114.0 24.6 115.4 24.7 116.8 24.8 118.2 24.9 119.6 25.0 121 1.6 25.1 122.6 25.2 124.2 25.3 125.8 25.4 127.4 25.5 129.0 25.6 130.6 25.7 132.2 25.8 133.8 25.9 135.4 26.0 137 1.9 26.1 138.9 26.2 140.8 26.3 142.7 26.4 144.6 26.5 146.5 26.6 148.4 26.7 150.3 26.8 152.2 26.9 154.1 27.0 156