Chain noise / worn cogs?
06-06-20, 07:49 AM
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Chain noise / worn cogs?
I recently replaced the chain on my mtb 1x10 slx. I noticed when I was sizing the new chain against the old that the old was stretched. laying the chains on the concrete side by side every foot or so it would be a little bit off. maybe an eighth to 3/16" over the full length. I really let that old chain go to long.
riding circles in the driveway new chain seemed fine but on the trail as soon as i pedal hard it's makes a lot of racket, mostly coming from the rear. noise in every gear. It was nice and quiet before the chain swap. I wonder if my worn chain worked with the worn cogs... and now the new chain is out of synch. or could it be something else. derailleur more or less in adjustment. old and new chains both sram 10spd. 10speed chains are all the same right? any guesses? I would put the old one back to see if noise goes away but I tossed it already.
riding circles in the driveway new chain seemed fine but on the trail as soon as i pedal hard it's makes a lot of racket, mostly coming from the rear. noise in every gear. It was nice and quiet before the chain swap. I wonder if my worn chain worked with the worn cogs... and now the new chain is out of synch. or could it be something else. derailleur more or less in adjustment. old and new chains both sram 10spd. 10speed chains are all the same right? any guesses? I would put the old one back to see if noise goes away but I tossed it already.
06-06-20, 08:10 AM
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06-06-20, 09:08 AM
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Agreed with the likelihood of worn cogs. This is why savvy home mechanics will replace their chain before it's completely worn out. The chain tends to wear at a fairly linear rate. But the cog teeth see a quickening rate of wear as the chain wear approaches it's end. So by replacing a almost but not yet worn out chain one can generally extend the life of the cogs.
A chain wear aspect that has no way to measure but still effects performance is it's lateral flex. the more worn a chain gets the greater it will flex across the link/pivots. So more overshift movement of the der is required to have the chain shift to the next cog. Replacing the chain before fully worn will keep the shifting feeling best too. Andy
A chain wear aspect that has no way to measure but still effects performance is it's lateral flex. the more worn a chain gets the greater it will flex across the link/pivots. So more overshift movement of the der is required to have the chain shift to the next cog. Replacing the chain before fully worn will keep the shifting feeling best too. Andy
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AndrewRStewart
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06-06-20, 09:53 AM
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Thanks yall. I'm definitely a half ass bike mechanic, so I like to get second opinions. Cassette ordered, back in business by wed.
06-06-20, 10:18 AM
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Andy and others have a lifetime of experience and are in a completely different league than us hacks.
06-06-20, 01:17 PM
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Cheers
