Originally Posted by
Wilfred Laurier
The three possibilities I can think of are: A damaged or twisted tooth on a chainring or cog that can damage a link; rough shifting under heavy pedalling load (also known as a 'loose nut behind the wheel'); and improper installation.
Improper installation is by far the most common cause of chain breakage.
I will look into the possibility of a damaged/twisted tooth.
I don't typically shift under heavy load, and certainly don't ride this bike any differently than any other in that regard.
Improper installation is possible, I suppose.