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Old 11-17-10, 05:56 PM   #1
Dancing Skeleton
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Shimano RD pulley, bushings vs. sealed bearing. Are different models interchangeable?

I have a 105 5700 RD on my bike. I notice that there is a bit of noise from the RD pulleys, kind of a muffled clacking. It's worse on the 50t front chainring. Everything is aligned, nothing is bent. The RD shifts crisply without any problems. I know the the 105 5700 uses bushings, not sealed bearings. My wife's Ultegra 6600 is much quieter, and I believe that it uses sealed bearings.
Can I replace the bushings on my 105 5700 with Ultegra 6700 (or 6600) or DA 7900 sealed bearing pulleys?
I'd just replace the RD, but mine is black, and the others are silver.

Thanks,

Peter

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Old 11-17-10, 10:39 PM   #2
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Quote:
Originally Posted by Peter2 View Post
I have a 105 5700 RD on my bike. I notice that there is a bit of noise from the RD pulleys, kind of a muffled clacking. It's worse on the 50t front chainring. Everything is aligned, nothing is bent. The RD shifts crisply without any problems. I know the the 105 5700 uses bushings, not sealed bearings. My wife's Ultegra 6600 is much quieter, and I believe that it uses sealed bearings.
Can I replace the bushings on my 105 5700 with Ultegra 6700 (or 6600) or DA 7900 sealed bearing pulleys?
I'd just replace the RD, but mine is black, and the others are silver.

Thanks,

Peter
Rear derailleur pulleys are generally interchangeable throughout Shimano. Older pulleys have 10 teeth, newer 9/10-speed pulleys have 11 teeth. Remember that the upper pulley must be a bushing type to allow it to float laterally a bit. This is Shimano's "Centeron" design.

You don't necessarily have to get Shimano pulleys, either. There are plenty of aftermarket pulleys around, from cheap to exorbitant:
http://harriscyclery.net/quality-bic...ory=512&type=t
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Old 11-17-10, 11:11 PM   #3
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Pullelys with bushings are imminently more reliable. The bearings in the 'higher end' pulleys wear out or get contaminated. I would suggest looking for other sources of noise before blaming the derailleur pulleys. The new 7900/6700/5700 systems are inherently more noisier than their previous generation cousins.
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