Ignoring the International Cycling Union‘s mostly arbitrary rules for what a bicycle is “supposed ... almost all bikes use a chain, a freewheel, and a derailleur if there are gears to ...
With components designed by cycling industry giant SRAM and made from heavy steel, the bike has rim brakes, two gears, two chainrings, and two separate chains. And that makes total sense.
Looking after your motorcycle chain is a really important chore, after all it is the part of your bike that runs the power to your rear wheel unless you own a belt or shaft-driven motorcycle.