Chain: It is recommended to replace it when riding for 2000~3000 kilometers.
Flywheel: It is recommended to check whether the flywheel teeth are deformed every 12 months; if deformed, replace it in time.
Guide wheel: Check or replace when there is noise.
Bottom axis: check every 12 months for looseness and need to be replaced.
Sprocket: If the speed is not smooth, it is recommended to replace it.
Brake cable: It is recommended to replace every 12 months.
Transmission cable: It is recommended to replace every 12 months.
Brake line pipe: It is recommended to replace every 12 months.
Transmission line tube: It is recommended to replace every 12 months.
Disc brake hose: It is recommended to replace every 12 months.
Tires: Replace with visual inspection of wear.
Brake pads (coming pads): It is recommended to wear to 0.5mm to replace.
Brake shoe: It is recommended to replace it when it is worn to the level of the "groove" mark.
Note: The degree of wear may vary due to different usage conditions. Please consult a professional technician for specific conditions.