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Front Derailleur noise when cross-chained - Normal?



 
 
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  #1  
Old August 19th 06, 09:36 PM posted to rec.bicycles.tech
Flybane
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Posts: 1
Default Front Derailleur noise when cross-chained - Normal?

Hello,

I'm new and would appreciate your patience - I have checked the
archives, but I apologize if this has already been covered.

Is it normal for the front derailleur to rub the chain in cross-chained
gears?

(Just to be clear, I do NOT cross-chain as a matter of course. This is
all "theoretical" since I my understanding is that it is not good for
the drivetrain to ride this way.)

However, I've been checking and tuning my bike wanting to learn to take
better care of it, and for perfection's sake, was
trying to optimize the derailleur. I found that it was impossible to
eliminate noise in the two cross-chain gears - if I cleared one, the
other would grind. I realize that in real life I wouldn't ride those
gears anyway, but as a bit of perfectionist, it bothers me anyway.

If any of this data helps, my bike is a 14 inch Giant Yukon, 22-32-42
chainrings with Shimano Altus derailleur, eight cogs with Shimano Acera
derailleur.

Again, thanks for your patience!

"Julian"

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  #2  
Old August 19th 06, 09:53 PM posted to rec.bicycles.tech
Phil Lee, Squid
external usenet poster
 
Posts: 161
Default Front Derailleur noise when cross-chained - Normal?

Flybane wrote:
Hello,

I'm new and would appreciate your patience - I have checked the
archives, but I apologize if this has already been covered.

Is it normal for the front derailleur to rub the chain in
cross-chained gears?

(Just to be clear, I do NOT cross-chain as a matter of course. This
is all "theoretical" since I my understanding is that it is not good
for the drivetrain to ride this way.)

However, I've been checking and tuning my bike wanting to learn to
take better care of it, and for perfection's sake, was
trying to optimize the derailleur. I found that it was impossible to
eliminate noise in the two cross-chain gears - if I cleared one, the
other would grind. I realize that in real life I wouldn't ride those
gears anyway, but as a bit of perfectionist, it bothers me anyway.

If any of this data helps, my bike is a 14 inch Giant Yukon, 22-32-42
chainrings with Shimano Altus derailleur, eight cogs with Shimano
Acera derailleur.

Again, thanks for your patience!

"Julian"


MTB cross-chaining in most cases doesn't cause chain rub because the
chainrings are smaller than on road bikes, but if it does, it's not a big
deal. You should be able to at least adjust the middle ring to get all 8
cogs in the rear with no rub.
--
Phil Lee, Squid


 




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