Going up a hill, downshift, and I didn't set the limiter from 11 to 10 gear ratio. The back derailleur did a 180 and broke off the frame with some of the frame. Unlucky or avoidable?
by -Crudu-
Going up a hill, downshift, and I didn't set the limiter from 11 to 10 gear ratio. The back derailleur did a 180 and broke off the frame with some of the frame. Unlucky or avoidable?
by -Crudu-
19 Comments
It sounds like you shifted right off the cassette? That could have been avoided by adjusting limit screws and making sure your hanger was straight.
Sometimes it just happens without warning.
However, you can prevent a lot if you set the limiter screws correctly and, above all, keep the drivetrain clean.
Technically, could be avoidable, but realistically, it was the derailleur hanger that was supposed to break, not the frame.
It sucks. Congrats on your new bike.
Thanks
Regular maintenance will catch almost all visible potential issues. So, yes, it was avoidable.
Yes. Your rear derailleur was not set up properly which caused the chain to get thrown off the big gear on the cassette leading to catastrophic failure.
This could have been avoided by setting up the rear derailleur properly.
Four things had to happen: operator choice; plastic disc removed; limit screws not set; frame without replaceable hanger (sacrificial part)
Swiss cheese lined up here.
At the bottom of the hill pick the gear you can make it all the way up the hill in and stay in it.
Downshifting under load puts a huge amount of strain through the derailleur, even if your limits are st correctly it can cause the derailleur cage to do some odd stuff, including bending inboard into your spokes.
That was only a matter of time
You kinda answered your own question – limit screws were not set correctly. So yes, could have been avoided.
Not correctly adjusting limit screws on the derailleur is something many have done at one time or another and it’s always a mistake that comes back to bite you on the ass. In the days before replaceable hangers seeing bikes with trashed wheels or mangled dropouts was quite common.
If I was a betting man I would put money on your dropout already being damaged or fatigued in some way before this for it to break like that before the hanger which is designed to break to prevent damage to your frame. If that’s the case it was going to fail at some time sooner or later.
Sounds like you know how it could have been avoided.
What we even look at here
With the chain as brown as it is it seems that there was no maintenance done on a bike for a long time. This could also be the reason for this issue.
> I didn’t set the limiter from 11 to 10 gear ratio.
There’s your answer as to how it could have been avoided.
I’m surprised as at first I thought you locked the bike and someone yanked it so hard it broke the frame
Avoidable, yes. Correctly setting the low gear limit and running a spoke protector (“dork disk”) would’ve avoided this.
Unfortunate in the extreme! Based on your photos, that frame is finished. Can’t weld a fix due to that carbon and epoxy, can’t replace just the hanger since the dropout broke off. Serious bummer.
Lube what’s that????
I think you answered your own question. Btw 11 and 10 are generally not compatible so your shifting will always be slightly off in most of your gears.