All of model of XB3-A gears' ratio as following table:
Model 25: 40, 50, 63
Model 32: 40, 52, 80, 110
Model 40: 40, 50, 65, 80, 100
Model 50: 41, 50, 60, 80, 100, 120, 160
Model 60: 50, 60, 80, 100, 120, 150, 160
Model 80: 50, 57, 80, 100, 104, 135, 160, 200
Model 100: 50, 80, 100, 120, 160, 200
Model 120: 50, 60, 80, 100, 120, 150, 160, 200, 243
Model 160: 50, 80, 100, 135, 160, 200
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