Originally Posted by
Altlandisto
It's just the two front sprockets which need replaced. The teeth are worn down, and would damage any new chain.
But rather than being able to just replace these 2 sprockets, it seems that I need to buy a full set of the 2 sprockets AND the 2 pedal cranks, including the bottom bracket.
The word you're looking for is "chainrings." You can replace just your chainrings as long as you match your bolt pattern (5-bolt, 4-bolt, etc) and BCD (bolt circle diameter).