The City and Comfort are equipped with a 7-speed manual shifter, so you can shift gears just as you would on a regular bike. Simply twist the gear shifter on the handlebar next to the right handlebar grip, to select a gear – the lower the number, the easier it is to pedal.
Always shift gears while pedaling the bike and never move the shifter while pedaling backward, nor pedal backwards immediately after having moved the shifter.