Road cyclists lend me your ear.

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July 28, 2017, 05:43 PM

smithnsig

Road cyclists lend me your ear.

Chainsuck, I got it. Just had a new cassette and chain installed. Now, when in the low front cog, the chain will suck around it. Only the low gear, the tall gear works great. It happens no matter what rear gear I'm in.

The chain is lubed, and everything looks in line. Seems to be a linear problem.

Any suggestions?

July 28, 2017, 06:08 PM

Balzé Halzé

Since you say the chain is lubed and clean, what is the condition of your chainrings? Are they pretty worn? Do they look like little shark fins?

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July 28, 2017, 06:28 PM

smithnsig

quote:
Originally posted by Balzé Halzé:
Since you say the chain is lubed and clean, what is the condition of your chainrings? Are they pretty worn? Do they look like little shark fins?

They look ok. Of course I do t know what to compare them to. The rear cassette was badly worn. Never had chainsuck with the old chain.

July 28, 2017, 06:37 PM

Russ59

Is it the right chain? If it's too fat, it may be binding up against the larger ring. Is there significant lateral clearance between the small ring and large ring, when the chain is in the smaller ring?

July 28, 2017, 06:44 PM

smithnsig

quote:
Originally posted by Russ59:
Is it the right chain? If it's too fat, it may be binding up against the larger ring. Is there significant lateral clearance between the small ring and large ring, when the chain is in the smaller ring?

Everything clears when I spin it on the rack. I can't find anything laterally that looks like it could be grabbing it.

July 28, 2017, 06:46 PM

c1steve

If the small chain ring was extremely worn, it could cause a new chain to stick. The old chain and ring may have worn together.

Look online for a small chainring, probably can buy one for $15. Small rings wear much, much faster than the large chain ring.

July 28, 2017, 08:06 PM

pbslinger

The only time I have had chain suck is when I took my freewheel apart and used grease to hold the ball bearings during assembly. Drag in the freewheel bearings made it less apt to spin and caused chain suck. Likely you have a freehub, check it for drag for whatever reason.

July 28, 2017, 08:14 PM

preten2b

Could be worn or bent teeth, like mentioned above.

I'll also add the obvious kind of question, the "is it plugged in?" kind. What speed is the cassette on your bike, and what model chain did they / or you put on. One cannot put a narrower chain on than what was intended.

July 28, 2017, 09:42 PM

lizardman_u

Also with a new rear cassette and new chain check to be sure your front derailleur is properly adjusted as it could be allowing the chain to go too far over.

There should be limiting screws you can adjust.

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July 28, 2017, 09:45 PM

caneau

Chain is probably too long and your derailleur spring isn't able to put on enough tension.

Is your cassette the same as your old? Is the chain the same number of links as your old one?

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July 28, 2017, 09:48 PM

r0gue

New chain lube is like cosmoline. Waxy horrid sticky packing grease. It's a preservative, NOT a lube. Pull the chain, soak it in mineral spirits. Get it good and cleaned. Rinse it in boiling hot water dry it, and after you clean the rings, reinstall it. Then lube with white lightning teflon lube. It will be fixed. No suckage.

July 28, 2017, 09:49 PM

caneau

quote:
Originally posted by r0gue:
New chain lube is like cosmoline. Waxy horrid sticky packing grease. It's a preservative, NOT a lube. Pull the chain, soak it in mineral spirits. Get it good and cleaned. Rinse it in boiling hot water dry it, and after you clean the rings, reinstall it. Then lube with white lightning teflon lube. It will be fixed. No suckage.

Good point as well. This is the first thing to check.

__________________________________
An operator is someone who picks up the phone when I dial 0.

July 28, 2017, 10:33 PM

smithnsig

quote:
Originally posted by caneau:
Chain is probably too long and your derailleur spring isn't able to put on enough tension.

Is your cassette the same as your old? Is the chain the same number of links as your old one?

I'll check the chain length. Yes the cassette is new version of the original.

Also, I'll check the chain to see if it needs cleaning.