PROPAIN Tyee CF Manuel D'utilisation page 41

// USER MANUAL
COMPONENT TASK
Remove the tires and check them for damage and embedded foreign objects. At
the same time check the tubeless rim tape, see above.
tires.
Gears / drive system Check wear of the chain with a chain wear gauge.
The chain must be replaced when the maximum permissible elongation
is measured with the chain wear gauge.
The chainrings and the cassette should also be replaced when replacing the
second chain.
Check the adjustment of rear derailleur and front derailleur.
When using an electronic gearshift or electronically dropper seat post: Change
button cells.
Battery type: CR2032
INTERVAL
3 months
3 months
2 years
or when red LED is on or blinking