I think this is a cause of a not so ideal chainline. Pretty much harmless I’d say.
Affectionate-Sun9373 on
You have the chain going on an angle from the sprocket to the cogs. When you pedal, the derailleur keeps the chain in line, when you pedal backwards there is nothing to stop that from happening. You will get away with it on the center cogs where the chain line is better. No biggie though, it should just catch when you pedal again.
bigredbicycles on
Looks like the indexing, b tension and lower limit are all wrong.
What changed that caused this to happen?
dopadelic on
Normal. Backpedaling will bring the chain to a neutral chainline – perfectly lined up with your chainring.
The fact that it went to the center cog of the cassette means your chainline is correct.
UndeadWorm on
Backpedaling more then half a crank rotation can cause this on modern, wide range, 1 by drivetrains.
It’s completely normal.
Not a problem when actually using the bike. There is never a situation where you would need to backpedal more then half a rotation.
schramalam77 on
Despite everyone telling you not to backpedal, it’s not normal. your B-screw looks a bit far out. Try turning it until there’s about a thumbs worth of space between the jockey wheel and the biggest ring. Check your hanger angle to make sure it’s not bent. Make sure your chain is the right length and your index your shifter.
Antpitta on
Two things:
– Yes this can happen when backpedaling on wide cassettes. this sub is full of videos and I’ve seen it happen to others
– It has literally NEVER happened to me in 30+ years riding and working on bikes
I’m not a derailleur wizard, I just read the docs and these days watch tutorials and set them up. I backpedal all my and my partner’s and family’s and friends’ bikes to put lube on chains. Has never happened to me personally. *shrug* either I have a golden touch, or have managed to avoid problematic drivetrains by basically always sticking with mid tier shimano and sram, or perhaps a lot or rear mechs get setup imperfectly.
caisnap on
Is your derailleur big enough for the cassette?
JamesDReddit on
If you can’t adjust it out the answer is always bent trailer
mtpelletier31 on
Can we just pin this as a sub…… don’t pedal backwards..
No-Addendum-4501 on
Do you do a lot of pedaling backward?
Spongy_Noob on
Did you lock your derailer? Try extending these 2 wheels bit more then see if it clicks maybe you locked it, used when removing a wheel etc
14 Comments
You’re back-pedalling, don’t do that.
[deleted]
I think this is a cause of a not so ideal chainline. Pretty much harmless I’d say.
You have the chain going on an angle from the sprocket to the cogs. When you pedal, the derailleur keeps the chain in line, when you pedal backwards there is nothing to stop that from happening. You will get away with it on the center cogs where the chain line is better. No biggie though, it should just catch when you pedal again.
Looks like the indexing, b tension and lower limit are all wrong.
What changed that caused this to happen?
Normal. Backpedaling will bring the chain to a neutral chainline – perfectly lined up with your chainring.
The fact that it went to the center cog of the cassette means your chainline is correct.
Backpedaling more then half a crank rotation can cause this on modern, wide range, 1 by drivetrains.
It’s completely normal.
Not a problem when actually using the bike. There is never a situation where you would need to backpedal more then half a rotation.
Despite everyone telling you not to backpedal, it’s not normal. your B-screw looks a bit far out. Try turning it until there’s about a thumbs worth of space between the jockey wheel and the biggest ring. Check your hanger angle to make sure it’s not bent. Make sure your chain is the right length and your index your shifter.
Two things:
– Yes this can happen when backpedaling on wide cassettes. this sub is full of videos and I’ve seen it happen to others
– It has literally NEVER happened to me in 30+ years riding and working on bikes
I’m not a derailleur wizard, I just read the docs and these days watch tutorials and set them up. I backpedal all my and my partner’s and family’s and friends’ bikes to put lube on chains. Has never happened to me personally. *shrug* either I have a golden touch, or have managed to avoid problematic drivetrains by basically always sticking with mid tier shimano and sram, or perhaps a lot or rear mechs get setup imperfectly.
Is your derailleur big enough for the cassette?
If you can’t adjust it out the answer is always bent trailer
Can we just pin this as a sub…… don’t pedal backwards..
Do you do a lot of pedaling backward?
Did you lock your derailer? Try extending these 2 wheels bit more then see if it clicks maybe you locked it, used when removing a wheel etc