Methods for controlling shifting of a bicycle

A method for controlling shifting of a bicycle, the method comprising:

• identifying, by a processor, a first gear shift command, a source of the first gear shift command being a control device of the bicycle;
• determining, by the processor, a first shift direction based on the first gear shift command;
• initiating, by the processor, a first shift of the bicycle in the first shift direction based on the first gear shift command;
• identifying, by the processor, a second gear shift command, a source of the second gear shift command being the processor or another processor, the second gear shift command being after the first gear shift command;
• determining, by the processor, a second shift direction based on the second gear shift command;
• determining, by the processor, a time period between the identifying of the first gear shift command and the identifying of the second gear shift command;
• comparing, by the processor, the determined time period to a predetermined time period;
• when, based on the comparing, the determined time period is less than the predetermined time period:
• initiating, by the processor, a shift of the bicycle in the second shift direction when the second shift direction and the first shift direction are a same shift direction;
• and
• blocking, by the processor, the shift of the bicycle in the second shift direction when the second shift direction and the first shift direction are different shift directions.