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New Cassette making strange noise.

Old 05-20-14, 07:41 PM
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New Cassette making strange noise.

I installed a new cassette on my bike and its making a noise, but only when you're pedaling and putting some power into the pedal. Its like a deep grinding/vibrating noise. I inspected and nothing is really grinding or hitting other stuff, Pullys are clear and and so is the Front derailleur. Also, it is making this noise in mostly in the 52t and 11 & 12 rings.

Everything else is in good shape including the chain, crank, and BB.

Any ideas? Probably will end up bringing it to my LBS.

Last edited by Caad08; 05-20-14 at 08:07 PM.
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Old 05-20-14, 07:53 PM
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Is the cassette you installed the same general sprocket size? Wonder if the guide pulley is rubbing on the bottom edge of the cogs? I'm definitely no expert but just a thought you could check.
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Old 05-20-14, 07:57 PM
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Originally Posted by Velocivixen
Is the cassette you installed the same general sprocket size? Wonder if the guide pulley is rubbing on the bottom edge of the cogs? I'm definitely no expert but just a thought you could check.
That was my first thought too.

My second thought has to do with the chain. Did the OP install a fresh chain to go with his new cassette? A worn chain on a new cassette might do that.
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Old 05-20-14, 07:59 PM
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Another possibility is the classic ran-the-chain-on-the-wrong-side-of-the-little-tab-in-the-RD-cage trick.
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Old 05-20-14, 08:00 PM
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I just installed a new cassette & nice quality chain last week as well as a new (to me) rear derailleur and I notice slight noise despite everything being carefully adjusted. I'm just giving it time for chain & cogs to "mesh" together. But if you're having loud obvious noise then sounds like something's amiss.
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Old 05-20-14, 08:11 PM
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Originally Posted by Velocivixen
Is the cassette you installed the same general sprocket size? Wonder if the guide pulley is rubbing on the bottom edge of the cogs? I'm definitely no expert but just a thought you could check.
The old cassette was sram 12-25. The new one is ultegra 11-23. I looked again and there's plenty of cleareance between the pullys and the cogs. after testing it again its most noticeable when I'm in the 52t and 11t / 12t

Originally Posted by Retro Grouch
That was my first thought too.

My second thought has to do with the chain. Did the OP install a fresh chain to go with his new cassette? A worn chain on a new cassette might do that.
Its not a fresh chain but not exactly old. According to the chain wear indicator tool I have the chain doesnt need to be replaced.
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Old 05-20-14, 08:16 PM
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Was the same chain previously used with this crankset?
A sign of a worn chainring is a loud noise caused by a new chain being tugged off the bottom of the chainring because the teeth have become slightly hooked and are trying to stick to the chainring. (aka "chain suck"). In an extreme case, the chain sticks and gets rammed up into the underside of the FD.
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Old 05-20-14, 08:20 PM
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Originally Posted by Shimagnolo
Another possibility is the classic ran-the-chain-on-the-wrong-side-of-the-little-tab-in-the-RD-cage trick.
I've seen that done. I've also done that scene.
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Old 05-20-14, 08:21 PM
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Did you use the special locking made to run with an 11 cog? Your old locking won't work with the 11.
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Old 05-20-14, 08:24 PM
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Originally Posted by Retro Grouch
I've seen that done. I've also done that scene.
Yes, first time I saw it was when I did it.
It took me about a block to figure out WTH I did.
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Old 05-20-14, 08:29 PM
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Originally Posted by Al1943
Did you use the special locking made to run with an 11 cog? Your old locking won't work with the 11.
I used the one that came in the box with the cassette. Maybe I didn't tighten it enough?

Originally Posted by Retro Grouch
I've seen that done. I've also done that scene.
Luckily I got it right this time

Originally Posted by Shimagnolo
Was the same chain previously used with this crankset?
A sign of a worn chainring is a loud noise caused by a new chain being tugged off the bottom of the chainring because the teeth have become slightly hooked and are trying to stick to the chainring. (aka "chain suck"). In an extreme case, the chain sticks and gets rammed up into the underside of the FD.
I dont think so since the noise is mostly coming from the back of the bike. Like the other poster said maybe I just have to give it time for the chain and new cassette to 'mesh together.' I dont want to risk damaging anything though.

Last edited by Caad08; 05-20-14 at 08:32 PM.
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Old 05-20-14, 09:53 PM
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I'm sure you've probably already done this, and I only mention it because I just put on a different derailleur today, but did you do all the indexing adjustments correctly? I find that on some cogs the chain sounds great and others it sounds noisy, so I make slight adjustments with barrel adjuster until it's all fine. Just a thought. Let us know how it works out though.
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Old 05-20-14, 09:59 PM
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I forgot to add the spacer last week, rattled like you described. The cassette lock ring went on nice and tight but actual cassette was loose without the very thin spacer. Just a thought, also depends on hub if the spacer is needed with Shimano cassettes.
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Old 05-21-14, 06:55 AM
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Originally Posted by Shimagnolo
Another possibility is the classic ran-the-chain-on-the-wrong-side-of-the-little-tab-in-the-RD-cage trick.
Very easy to do by accident................
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