Rushing home earlier as my daughter was on the back and had asserted she needed a poo (she didn’t). My chain was skipping in a bizarre way. I couldn’t stop to check it obviously. But just inspected the drive train and found this link was completely twisted. How does this even happen? I was carrying extra weight on the bike of course. But I can’t imagine that’s enough to do this to a chain. The drivetrain gets pretty regular maintenance, and my chain wear tool gives it some life left. I’ve had chains break from west but never twist.
by archy_bold
5 Comments
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Without the introduction of a foreign object into the chain, it’s typically from shifting under load. If you shift under full force, the ker-thunk noise you are likely to hear is from the chain jamming against the sprocket and releasing as it’s pushed sideways by the derailleur. If it jams hard enough, you’ll bend or break the chain.
I think I’ve only done this once, on an 8 speed chain while mountain biking, but yeah, bad shift timing can do this, if you try to shift a bunch of gears while simultaneously mashing the cranks.
I know a hill that might do that if the chain didn’t snap first.
Unrelated, but thank you for clarifying your daughter didn’t actually poo.