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Old 12-27-04, 08:39 AM   #1
MrCjolsen
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Chain Suck

What causes it.
How do I keep it from happening again?

Almost new bike, Sora triple. Going up a steep hill and shifting down to the small chainring. No major damage
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Old 12-27-04, 09:49 AM   #2
MudPie
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Quote:
Originally Posted by MrCjolsen
What causes it.
How do I keep it from happening again?

Almost new bike, Sora triple. Going up a steep hill and shifting down to the small chainring. No major damage
A few factors cause chain suck - bent tooth on chainring, drive train misalignment, bad/stiff link(s) on chain, frame design.... What brand/model frame and chain do you have? Some say that shifting under heavy load (slow cadence) contributes to chainsuck too - so make sure you get the cranks spinning before you shift down.

In the past, on a mountain bike, I noticed chainsuck was more likely to occur with a muddy/gritty chain. However, chainsuck went away when I started cleaning and lubing the chain every 3rd ride or so. I use a "dry" lube, too. So I have some experiece with a dirty chain syndrome.

I read (in www.mtbr.com) that Gary Fisher (especially their 2004 Cake models) were very prone to chainsuck. I contacted Fisher and they said it was due to excessive play in the rear suspension pivot, implying alignment. (Fisher did repair all their remaining stock and I bought one.)
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Old 12-27-04, 12:04 PM   #3
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I posted a question about this here the other day and someone pointed me to this site:

http://www.fagan.co.za/Bikes/Csuck/

It's got way more information about chain suck than you ever wanted to know.
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