Bagkæden

Bagkæden is a Danish term that translates to "back chain" or "rear chain" and primarily refers to the chain drive system in a bicycle that propels the rear wheel. It comprises several key components, including the chain itself, the rear cassette or freewheel (a cluster of sprockets mounted on the rear hub), and the derailleur system (if the bicycle has gears).

The function of the bagkæde is to transmit power from the pedals, through the front chainrings and the chain, to the rear cogs. When the rider pedals, the front chainrings turn, pulling the chain. The chain then engages with the sprockets on the rear wheel, causing the wheel to rotate and propel the bicycle forward. The size of the front chainrings and the rear sprockets determine the gear ratio, which affects how much effort is required to pedal and the speed the bicycle can achieve.

A well-maintained bagkæde is crucial for efficient cycling. Regular cleaning and lubrication prevent wear and tear on the components, ensuring smooth gear changes and minimizing the risk of the chain breaking or slipping. The rear derailleur, part of the bagkæde system, is responsible for moving the chain between the different sprockets on the cassette, allowing the rider to select appropriate gears for varying terrain and speeds.