chain replacement



vio765

New Member
Jan 20, 2005
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i got a SRAM PC-99 chain with 2550 miles on it and i compleely clean and relube it every 150-200 miles. still shifts ok, but im starting to detect some weird things like an odd noise from the rear derailleur whenever i hit some rough road (like cracks). am i ok or getting close to replace time?
 

bobbyOCR

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Aug 31, 2005
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vio765 said:
i got a SRAM PC-99 chain with 2550 miles on it and i compleely clean and relube it every 150-200 miles. still shifts ok, but im starting to detect some weird things like an odd noise from the rear derailleur whenever i hit some rough road (like cracks). am i ok or getting close to replace time?
I think you should be able to get at least twice that out of a chain. I am replacing mine now after 12,500km of use, because it is when I always do it. I replace my cassette as well at the same time, because new chains hate used cassettes and vice versa. I have a few spare chains and cassettes now.
 

capwater

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Sep 15, 2003
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Measure the freakin' chain and take the guess work out of the equation, man....... Mileage is a very ppor determining factor.
 

alfeng

Well-Known Member
Jul 23, 2005
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vio765 said:
i got a SRAM PC-99 chain with 2550 miles on it and i compleely clean and relube it every 150-200 miles. still shifts ok, but im starting to detect some weird things like an odd noise from the rear derailleur whenever i hit some rough road (like cracks). am i ok or getting close to replace time?
Although you are fastidious with your chain maintenance, are you maintaining your rear derailleur's indexing adjustment & keeping the pivots cleaned & greased + the jockey wheels lubed?
 

John M

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Jun 21, 2005
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vio765 said:
i got a SRAM PC-99 chain with 2550 miles on it and i compleely clean and relube it every 150-200 miles. still shifts ok, but im starting to detect some weird things like an odd noise from the rear derailleur whenever i hit some rough road (like cracks). am i ok or getting close to replace time?

I agree with capwater. There are so many variables that go into chainwear (riding style, climate, etc...) that you can only use something objective like measuring chain stretch.
 

vio765

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Jan 20, 2005
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im guessing the chain has stretched a tad bit. the tension seems a little too loose. i might take a link out. and yes, i keep everything in perfect maintainance. shifting still works, but no matter what i do, it just isnt as crisp as it used to be. so ill try taking out a link and seeing how that helps.
 

dhk2

Well-Known Member
Aug 8, 2006
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vio765 said:
im guessing the chain has stretched a tad bit. the tension seems a little too loose. i might take a link out. and yes, i keep everything in perfect maintainance. shifting still works, but no matter what i do, it just isnt as crisp as it used to be. so ill try taking out a link and seeing how that helps.
Taking a link out of a worn chain will do nothing. The normal wear standard I've seen is 1%, or not more than 1/8" over 12" of chain. Many of us replace sooner than this.

If you don't know how to measure the chain, suggest you go a cycling friend or your LBS for a quick lesson. To make checking really quick and idiot-proof, I bought a Park CC-3 gauge for under $10. It has two sides, to measure 0.75% and 1.0% of wear.

When the 0.75% side drops into the links, the chain is ready to be replaced. If the gauge shows the chain is worn beyond 1%, you may need to replace the cassette also. You'll know as soon as you put the new chain on.