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Jun 15, 2018 at 2:10 history edited Daniel R Hicks CC BY-SA 4.0
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Nov 3, 2011 at 14:57 vote accept ChrisW
Nov 3, 2011 at 11:44 comment added Daniel R Hicks Yep, when it jammed the chain had probably been sucked by a hooked sprocket or some such and gotten itself into a knot. Or else you got the chain crossed in the derailer. Chains can bend up/down but they do not like to bend left/right.
Nov 3, 2011 at 1:48 comment added ChrisW I expect it was damaged. I was surprised once when the drive seemed to jam when I was accelerating up-hill. I got off and looked and didn't see the obstruction, and rode on.
Nov 2, 2011 at 15:39 comment added Daniel R Hicks There really shouldn't be "loose links" in the chain unless it was improperly joined, or has been damaged somehow.
Nov 2, 2011 at 15:38 comment added Daniel R Hicks "Exceedingly rare" means that it's never actually happened to me, in tens of thousands of miles, but I have seen it happen several times to others in my group (who generally were behaving like gorillas and pedaling hard as they shifted). I did come close this past summer when a worn chain and front cog combined to suck the chain into a knot. But luckily I stopped pedaling instantly and avoided further damage.
Nov 2, 2011 at 14:52 comment added ChrisW Does "exceedingly rare" mean that you don't carry the means to fix it on the road, but count on it not happening?
Nov 2, 2011 at 13:37 comment added ChrisW Is it possible that there is/was a loose link on the chain? Which I was supposed to notice and fix during maintenance?
Nov 2, 2011 at 11:30 comment added Crowley I've broken chain only once. When I install it badly.
Nov 2, 2011 at 11:18 history answered Daniel R Hicks CC BY-SA 3.0