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Yeah, that's a random pic from the internet. Chain is sram. Always had good experience with 10 speed sram though...
Only thing I can think about is I dropped the bike twice since installing that chain and once it was rusty as I put it away without cleaning after a very wet and dirty commute. But breaking...
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Oooh I see, sorry I misunderstood about the pic. Yeah honestly the chain breaking like that is rather rare. I've see chains rusted almost stiff that didn't break, just put up a lot of resistance. And the chain is usually not what takes the most impact in a crash, so I'm not sure it'd be down to that...
Doesn't it say 'Shimano' on the picture?
But yeah, that's a new one to me too. Actually not quite - I've had it happen before with a chain I repaired without using a quick link, as I failed to put the pin through properly. That was completely my own fault though.