Chain stuck! Grrrr

[newforestbiker83]

Hi all, this is a persistent problem I'm experiencing and wondering if anyone else has had this. I think it's definitely to do with grit and dirt stopping some of the chain links from moving freely and causing the chain to go up from the front chainring and getting jammed up in the bike frame. The solution must be continual oiling of the chain and ring but I was also wondering what the purpose of the screw at the back of de-railer is? It seems to move the whole system up or down but I'm guessing the issue is more to do with the chain itself and keeping it well oiled. Thanks!

 

[jimbob]

Could be a worn chainring?

 

[RustyMTB]

The screw on the derailleur is your B tension screw & is more about smooth shifting & chain tension. If your chainring is eating your chain regularly, you have chain suck. Lots of stuff on the internet about causes & cures. Top & bottom, clean your drivetrain, keep it lubed & inspect chain & chain ring for wear/bent teeth

 

[RustyIron]

Hi all, this is a persistent problem I'm experiencing and wondering if anyone else has had this.

Looks like chain suck. It happens when your drivetrain components are worn out. Instead of the chain being pulled along by all the teeth on the chainring equally, the tooth on the bottom is carrying more of the load. Instead of letting go of the chain when it reaches the bottom, it drags the chain back up. The result is exactly what you're experiencing.

I suspect you'll be buying a chain, chainring, and cassette in the not-too-distant future.

 

[Plummet]

Yep, worn out parts and or new chain on too worn parts. Replace the parts, no more chain suck.

 

[newforestbiker83]

"chain suck" never heard of that one LOL. Indeed, the chain is brand new, the cassette and the chainring. All new. And it still happens. Possibly I need some better lube

 

[Twisted Fork]

If your drivetrain components are relatively new, is your problem potentially that your chain is placed a half link off on the chainring? This would result in the narrow links of the chain sitting on the alternating wide teeth of the chainring and not releasing smoothly. Just move the links forward or back one tooth on the chainring. I assume you’re using a compatible Shimano chainring too, and not a SRAM ring?

 

[Twisted Fork]

Actually, it looks like your SNAIL ZFC-XD chainring is made for 8, 9, 10 or 11 speed chains. If you’re using a 12 speed chain, the links are too narrow to fit properly on that ring. You’ll need a proper 12 speed Shimano HG compatible chainring.

 

[newforestbiker83]

That's it, I should use a Shimano compatible chainring as the chain is a 9 speed Shimano

 

[newforestbiker83]

If your drivetrain components are relatively new, is your problem potentially that your chain is placed a half link off on the chainring? This would result in the narrow links of the chain sitting on the alternating wide teeth of the chainring and not releasing smoothly. Just move the links forward or back one tooth on the chainring. I assume you’re using a compatible Shimano chainring too, and not a SRAM ring?

This is the most useful information and the main reason it was happening. I've applied some grease on the chainring too. The winner is....Twisted Fork!

 

[Howz]

Happened to me on a brand new bike after cycling across a wet beach…….sand etc clogging everything up.

 

[steve_sordy]

This is the most useful information and the main reason it was happening. I've applied some grease on the chainring too. The winner is....Twisted Fork!

If you put an "@" symbol in front of the username, like this @Twisted Fork , then the user gets a message to know that he has been quoted.

 

[David g]

That is what was happening on my cube Kathmandu so if replaced the cassette and derailer and chain but still the same .so now iv replace my chainring and it's ok