Chain plate cracking?
I fitted a new chain on my winter bike about 2 months ago because the first one cracked like in the photo below. My current chain (pictured below) has done exactly the same thing. It was fitted correctly, is the correct length and none of the sprockets or chain rings are worn. I run a compact (50/34) with a 12/26 block on the back. Anybody have any ideas why this might be happening?