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Old 10-02-06, 08:11 AM   #1
pothound
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rear derailer pulleys

i removed my rear derailer pulleys to clean and grease. i'm worried that i might have the pulleys reversed. is there a way of knowing which pulley goes where? thank you.
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Old 10-02-06, 08:21 AM   #2
jcm
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Quote:
Originally Posted by pothound
i removed my rear derailer pulleys to clean and grease. i'm worried that i might have the pulleys reversed. is there a way of knowing which pulley goes where? thank you.
On my bikes the upper pulley has a different look - it's teeth are 'thinner.' That is, there is a 'shoulder' where they join the pulley body. The lower one has the teeth tapered into the body. Hope that helps.
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Old 10-02-06, 08:54 AM   #3
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thanks for the reply. the derailer is along cage xt. one pully has printing on it with an arrow. the other pully looks plain. i put the1st pully at the bottom and plain pully at the top. it is probably wrong. thankyou
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Old 10-02-06, 10:23 AM   #4
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The top pulley will have a little side to side play to help cope with slight derailler misalignments.
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Old 10-02-06, 05:54 PM   #5
Ray Dockrey
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The one time I got them reversed when I tightened down the cage they wouldn't turn. That is how I knew I had something wrong. I reversed them and they tightened down just fine.
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Old 10-03-06, 11:34 AM   #6
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Many lower-end DRs have pullys that are very similar. On better items the top one (more stress) will have a different bearing material. The Shimano 600 DR on my 82 Cilo has what looks like a ceramic insert.
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