It's possible that your chain is too long and all that happened was that the chain bounced and got caught up. Usually something like this is called "chain suck." I've had a chain wrap itself around the rear derailleur and ripped the entire derailleur hanger off (that ended the ride!), and I've had the front derailleur ripped off in similar fashion (ripping off the front derailleur does not end the ride). This in particular tends to happen to bicycles with triple chainrings, as all my bikes had. It's one of the reasons I've switched to 1x --- with a narrow-wide chainring, no FD, and a clutch derailleur these don't tend to happen.
On Thursday, September 15, 2022 at 7:43:43 PM UTC-7 Matthew Williams wrote: > My chain jammed in my front derailleur. What happened? > > I wasn’t going fast or slow, I hadn’t shifted gears, and I wasn’t putting > any unusual stress or power on the drivetrain. I was just cruising along a > flat street, gently pedaling, when suddenly my cranks locked and I couldn’t > pedal forward or backward. > > I coasted to a stop and looked down. The chain was fouled and jammed in > the front derailleur, and the rear derailleur was parallel with > the chainstays. I walked my bike home and took photos of the damage. I have > many questions for you experts: > > 1: What caused this? How and why did my chain get jammed in the front > derailleur? > > 2: Does this breakdown have a name? > > 3: Is this something I did or failed to do e.g. bad shifting, lack of > maintenance, is something bent or misaligned, or is it just the inevitable > entropy from mileage and time? > > 4: How do I prevent this from happening? > > 5: How do I fix it and what tools will I need if I’m out on a long ride? > > Photos below. > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/55c70778-a906-466a-b41b-9f478a89ef42n%40googlegroups.com.
