Gear Ratio Chart

A quick basic chart outlining gear ratios. Very handy for finding sister ratios, such as 19/77 is the same as 20/81

Engine1011121314151617181920
Sprocket
707.0006.3645.8335.3855.0004.6674.3754.1183.8893.6843.500
717.1006.4555.9175.4625.0714.7334.4384.1763.9443.7373.550
727.2006.5456.0005.5385.1434.8004.5004.2354.0003.7893.600
737.3006.6366.0835.6155.2144.8674.5634.2944.0563.8423.650
747.4006.7276.1675.6925.2864.9334.6254.3534.1113.8953.700
757.5006.8186.2505.7695.3575.0004.6884.4124.1673.9473.750
767.6006.9096.3335.8465.4295.0674.7504.4714.2224.0003.800
777.7007.0006.4175.9235.5005.1334.8134.5294.2784.0533.850
787.8007.0916.5006.0005.5715.2004.8754.5884.3334.1053.900
797.9007.1826.5836.0775.6435.2674.9384.6474.3894.1583.950
808.0007.2736.6676.1545.7145.3335.0004.7064.4444.2114.000
818.1007.3646.7506.2315.7865.4005.0634.7654.5004.2634.050
828.2007.4556.8336.3085.8575.4675.1254.8244.5564.3164.100
838.3007.5456.9176.3855.9295.5335.1884.8824.6114.3684.150
848.4007.6367.0006.4626.0005.6005.2504.9414.6674.4214.200
858.5007.7277.0836.5386.0715.6675.3135.0004.7224.4744.250
868.6007.8187.1676.6156.1435.7335.3755.0594.7784.5264.300
878.7007.9097.2506.6926.2145.8005.4385.1184.8334.5794.350
888.8008.0007.3336.7696.2865.8675.5005.1764.8894.6324.400
898.9008.0917.4176.8466.3575.9335.5635.2354.9444.6844.450
909.0008.1827.5006.9236.4296.0005.6255.2945.0004.7374.500