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Sram Red RD Pulley Cage Breaking

davidmi24davidmi24 Posts: 2
edited November 2014 in Workshop
Hello,

After yesterday's ride, I attempted to remove my rear wheel, and when I pulled back on the derailleur pulley cage, it simply popped out. No cracking, no loose pieces. I brought it to my local LBS, and they said the pin (pictured) was completely worn down, and could not be replaced. Basically, I would need a new RD. Has anyone experienced this before, and if so, do you have any advice? Thanks in advance.

David

Posts

  • pinnopinno Posts: 42,721
    Is everything in alignment? Rear Mech hanger etc?

    You'll have to find the root cause before forking out for a new RD.
    seanoconn - gruagach craic!
  • StillGoingStillGoing Posts: 5,207
    davidmi24 wrote:
    Hello,

    After yesterday's ride, I attempted to remove my rear wheel, and when I pulled back on the derailleur pulley cage, it simply popped out. No cracking, no loose pieces. I brought it to my local LBS, and they said the pin (pictured) was completely worn down, and could not be replaced. Basically, I would need a new RD. Has anyone experienced this before, and if so, do you have any advice? Thanks in advance.

    David

    I don't get what the LBS are going on about? From your image I'm assuming you mean the jockey wheel cage has come apart? The cage will separate in order to change the jockey wheels being held together with a allen head bolt. SRAM will gladly supply a new bolt if this is worn without the need to buy a complete new derailleur.

    I agree that you need to find what caused enough stresses to be put on the derailleur to force the cage apart. How old is the derailleur, what kind of abuse has it been getting in terms of usage and maintenance and when was the last time it was checked for security?

    44329_00_d.jpg

    red_der.jpg
    I ride a bike. Doesn't make me green or a tree hugger. I drive a car too.
  • keef66keef66 Posts: 13,123
    I read it to mean that the entire pulley cage had come away from the derailleur body which in turn was left attached to the hanger. Struggling to reconcile the pin in the picture with your exploded diagram though; wondering if it's the thing that attached the outer cage to the derailleur. It's clearly not going to be available as a spare part though, so new mech is likely the only solution.

    If it's relatively new won't it be a warranty job??

    It's not a WiFli rear mech by any chance....

    http://www.cpsc.gov/en/Recalls/2014/SRA ... es/#remedy
  • StillGoingStillGoing Posts: 5,207
    edited November 2014
    In each exploded view of the Red derailleur models, the jockey wheel cage is secured to the main body with an allen head bolt. What I'm guessing is that the OP's derailleur is a very early 2010 model? If that is the case, then yes, new derailleur.

    https://sram-cdn-pull-zone-gsdesign.net ... reva_0.pdf
    I ride a bike. Doesn't make me green or a tree hugger. I drive a car too.
  • StillGoingStillGoing Posts: 5,207
    Just done a bit more checking and it would appear you have a very early model Red rear derailleur? The means to secure the cage to the main body is similar to that used on MTB rear derailleurs from SRAM. See the attached pdf about page 32. Presumably you have a coiled spring that goes around the pin in your image?

    https://www.sram.com/sites/default/file ... c_reva.pdf

    But, you can buy a full cage replacement although out of stock from the supplier below. Might be worth trying SRAM directly. If they don't have it, nobody will and it will mean a new derailleur.

    http://en.hollandbikeshop.com/sram/sram ... ey-wheels/
    I ride a bike. Doesn't make me green or a tree hugger. I drive a car too.
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