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  1. #1
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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.

  2. #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.

  3. #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

  4. #4
    Senior Member Steev's Avatar
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    The top pulley will have a little side to side play to help cope with slight derailler misalignments.

  5. #5
    Senior Member Ray Dockrey's Avatar
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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.

  6. #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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