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Old 05-18-05, 10:19 PM   #1
pqken
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The teeth on the rear derailler wheels on my Mtb are worn down to almost a point. They were originally squared and flat. Does this create any problem in shifting or the position/angle of the chain in relation to the sprocket? My bike shop guy says don't worry about it and encourages me not to replace them. Would there be an advantage to replacing them?

Thanks in advance.
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Old 05-18-05, 10:22 PM   #2
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Sounds like they are worn out. He may be suggesting that you not change it because the bike might not be worth it. What kind of bike is it?
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Old 05-18-05, 10:23 PM   #3
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if the derailleur still works couldn't he just change the cogs?
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Old 05-18-05, 10:25 PM   #4
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Oh derailluer pulleys! If your bike shop even charges you for new ones, it couldnt be more than 10 bucks max.
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Old 05-19-05, 08:16 AM   #5
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Price depends on the model. LX and below have simple jockey wheels that cost a couple of bucks each. XT has on with sealed bearing and one with sealed bushing, cost about 25 for a set up here in Canada. XTR has both sealed bearing pulleys, cost a mint.
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Old 05-19-05, 11:20 AM   #6
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As long as they still spin reasonably smoothly you won't gain anything by replacing them.
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Old 05-22-05, 07:42 AM   #7
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Sorry bout any confusion, I just looked in Zinn's Mtb manual, he calls them "jockey wheels" or "guide pulleys". My bike is a Trek 8500 and the derailleur is XTR. Looks like I'll be replacing them...and paying a mint.

Thanks for all your replies.
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