Method and device for switching gears, medium and program product

The invention aims at providing a gear switching method and device, a medium and a program product, and the method comprises the steps that in response to a treading behavior of a user on a target bicycle, a bicycle speed interval corresponding to a first current bicycle speed is determined according to the first current bicycle speed of the target bicycle; according to the vehicle speed interval, a target gear currently suitable for the target bicycle is determined, and if a rear wheel gear currently used by the target bicycle is different from the target gear, the rear wheel gear currently used by the target bicycle is switched into the target gear through a speed change system. The rear wheel gear currently used by the target bicycle can be automatically switched according to the current bicycle speed of the target bicycle, so that the switched rear wheel gear can adapt to the current bicycle speed, a user can still ride the bicycle in a low-speed treading mode during high-speed riding, efficient utilizati