Originally Posted by
due ruote
I don't keep track of how often I break chains. Break with a chain tool, that is; I have never "broken" one in use. I think that "once you punch out a pin" statement is false. This assumes you are using the tool correctly, keeping the pin ends even, making sure you aren't leaving tight links, etc.
I do think mixing brands, as it sounds like you did, is probably a bad idea.
I have never broken a chain on a road bike. (I've broken a couple MTB chains, but that was due to impacts.) I use primarily vintage Regina and Sedis chains and they have never given me any problems, despite countless removals. I'm fairly meticulous about keeping a clean drivetrain, so I may take off my chains for soaking/cleaning 3-6 times per year depending on the bike. I used to do a complete strip down & overhaul about once per month during my racing days. It's important that the pin go back in straight, or you run the risk of the pin bending/pushing the outer plate when it is re-installed. I suspect this (a slightly bent chain link plate) is why most chains break.