Kenevo Gen1 Chain suck

[brizi2003]

Just fitted a new chain and I'm experiencing a little bit of "drag" from the chain leaving the chain ring. Ring was brand new with the previous chain and chain was replaced when 0.5% worn. I normally get 3 chains to a chain ring so it's a bit surprising. I'm reluctant to fit a new chaing ring as it's not that bad but it is annoying. Has anyone had any success with deburring a worn chain ring to stop this?

 

[Mikerb]

was the changed chainring steel??

 

[brizi2003]

was the changed chainring steel??

Yes, the Specialized one. I've used these before without problems.

 

[Mikerb]

Same make of chain?? If so the most likely cause is wax on the new chain ( the wax new chains are treated with for packaging and storage). I always strip a new chain to get rid of all that gunk and then lube as normal.

 

[RustyIron]

Has anyone had any success with deburring a worn chain ring to stop this?

Chain suck is the result when the leading edge of each tooth is worn so much that the distances are greater than the distances between the chain links. When you installed the new chain, the distances between chain links became less, and the chain suck became more evident. Grinding away even more material from the chainring will not help the situation. It's time to buy some new parts. And don't be surprised if you start experiencing problems on the cassette.

 

[Snrbrtsn]

Don’t suppose it’s a praxis chainring with the Shimano hyper glide ?
Stating the obvious though chains are sided as is the quick link and align on the chainring a certain way per stencilling

 

[brizi2003]

Same make of chain?? If so the most likely cause is wax on the new chain ( the wax new chains are treated with for packaging and storage). I always strip a new chain to get rid of all that gunk and then lube as normal.

Hi @Mikerb , yes same make. As I use a wax based lube I always degrease and lube before fitting.

 

[brizi2003]

Chain suck is the result when the leading edge of each tooth is worn so much that the distances are greater than the distances between the chain links. When you installed the new chain, the distances between chain links became less, and the chain suck became more evident. Grinding away even more material from the chainring will not help the situation. It's time to buy some new parts. And don't be surprised if you start experiencing problems on the cassette.

Hi @RustyIron I think you're right I'll just have to bite the bullet.

 

[brizi2003]

Don’t suppose it’s a praxis chainring with the Shimano hyper glide ?
Stating the obvious though chains are sided as is the quick link and align on the chainring a certain way per stencilling

View attachment 76922

Hi @Snrbrtsn , it is a Shimano Chain and the standard Specialized ring which I assume is Praxis. And I have fitted the correct way. Looks like a new ring is the only answer.

 

[nB2000]

Hi @Snrbrtsn , it is a Shimano Chain and the standard Specialized ring which I assume is Praxis. And I have fitted the correct way. Looks like a new ring is the only answer.

did the new ring fix it? chain-suck is nasty, especially if the frames carbon (like the KSL)

 

[lumpy]

I use a Wolf Tooth chainring on my Levo. It's a harder steel and lasts longer than the Praxis

 

[brizi2003]

did the new ring fix it? chain-suck is nasty, especially if the frames carbon (like the KSL)

Yes new ring fixed it.

 

[brizi2003]

I use a Wolf Tooth chainring on my Levo. It's a harder steel and lasts longer than the Praxis

Ouch, that is expensive. But as long as it lasts about 3x longer should work out cheaper. Does it have threads for the mounting bolts like the Praxis?

 

[RickBullotta]

In the future, also look for a "snaggletooth" on the chainring. Sometimes a rock strike will leave a burr on the edge of one or more teeth that grabs the chain and cause the dreaded chainsuck. You can just file it off and ride on it no problem.