Rohloff and Brompton wheel gear ratio
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ABCDEFGHIJKLMNOPQR
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Rohloff 14-speedSPEED
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wheelsizeGearGear Inchesdelta ratioCadence 50Cadence 70Cadence 85Cadence 100Gearcm/r
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20122.70.27904.528.8613.0718.09Lower efficiency156.8985625
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225.70.3160-0.1335.1210.0414.8020.49Lower efficiency264.4442513.26164875
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Chainring329.30.3600-0.1395.8411.4416.8723.34Lower efficiency373.417513.92405063
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65433.20.4090-0.1366.6313.0019.1626.52Lower efficiency483.410437513.61111111
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537.70.4640-0.1347.5214.7421.7430.09Lower efficiency594.62713.44743276
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Cog642.90.5280-0.1388.5616.7824.7434.24Lower efficiency6107.67913.79310345
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16748.80.6000-0.1369.7319.0628.1138.91Lower efficiency7122.362513.63636364
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855.40.6820-0.13711.0621.6731.9544.228139.08537513.66666667
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962.90.7740-0.13512.5524.5936.2650.199157.84762513.48973607
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1071.60.8810-0.13814.2827.9941.2757.1310179.668937513.82428941
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1181.31.0000-0.13516.2131.7746.8564.84MOST efficient11203.937513.50737798
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1292.21.1350-0.13518.4036.0653.1773.6012231.469062513.5
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13105.01.2920-0.13820.9441.0560.5383.7813263.4872513.83259912
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14119.21.4670-0.13523.7846.6168.7395.1214299.176312513.54489164
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SPEEDmph
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Sum=(1.76*0.62)19.8581764140.52689063
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29.1319447959.45294855
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2.826750621
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21.9375todayfuture ---->
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46/1644/1642/1640/1638/1636/16
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20.8619.9519.0418.1417.2316.32
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23.6222.5921.5720.5419.5118.49
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26.9125.7424.5723.4022.2321.06
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30.5729.2427.9126.5925.2623.93
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34.6833.1831.6730.1628.6527.14
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39.4737.7536.0434.3232.6030.89
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44.8542.9040.9539.0037.0535.10
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50.9848.7646.5544.3342.1139.90
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57.8655.3452.8350.3147.7945.28
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65.8562.9960.1357.2754.4051.54
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74.7571.5068.2565.0061.7558.50
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84.8481.1577.4673.7870.0966.40
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96.5892.3888.1883.9879.7875.58
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109.66104.89100.1295.3690.5985.82
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9 Speed 48-38-24, 11-34
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113.589.856.7
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96.076.048.0
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83.265.941.6
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73.458.136.7
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62.449.431.2
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54.343.027.1
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48.038.024.0
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41.632.920.8
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36.729.118.40
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