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  1. #1
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    Can there be too many replacement pins in a 9sp Ultegra chain?

    Look out! I'm bumping my 2-year-old thread today (Sep 12, 2011), because I didn't really get a straight answer, although, AEO's 2 posts were the best.

    I have quite a few different frames, and plan to still buy more off Ebay (because used aluminum frames are so freaking cheap), so I'm always changing stuff over between different bikes. The chain I'm looking at has about 9 replacement pins, and still has life in it.

    Considering the "a chain is only as strong as it's weakest link" thing makes me think that possibly, in theory, every link could have a replacement pin. No? Maybe that's too simple

    Does this quote form Shimano (posted by AEO in post #10) suggest that every 2nd link can have a replacement pins?
    "Do not select a previously installed connecting rivet, or a rivet immediately adjacent to a connecting rivet"
    Anyway, is there such a thing as too many?
    Last edited by Disco Stu; 09-12-11 at 10:41 PM.

  2. #2
    AEO
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    yes, it could.
    why not just get some sram gold QR plates? they work perfectly with shimano 9sp chains.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

  3. #3
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    Hmmm, good idea.
    Thanks.

    But how many is too many pins?
    Half a dozen?

  4. #4
    AEO
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    I can't remember, but as long as the replacement pins are 3~5 links apart from each other.... so the amount of links you have divided by 5
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

  5. #5
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    Right.
    Thanks

  6. #6
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    How many miles you have on that chain that's been on 5 different bikes? Methinks that poor chain might be near the end of his useful life anyway if it's seen that many bikes.

  7. #7
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    Quote Originally Posted by Mr. Underbridge View Post
    How many miles you have on that chain that's been on 5 different bikes? Methinks that poor chain might be near the end of his useful life anyway if it's seen that many bikes.
    The OP may have been removing/replacing pins as part of chain cleaning.
    Riding the Ohio MS Central Ohio Challenge tour, July 12th.

  8. #8
    Call me The Breeze I_bRAD's Avatar
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    Quote Originally Posted by AEO View Post
    I can't remember, but as long as the replacement pins are 3~5 links apart from each other.... so the amount of links you have divided by 5

    How did you come up with that formula?

  9. #9
    me have long head tube TallRider's Avatar
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    I wonder about the formula too. If the replacement pins work as pivots, it seems that they should work as pivots however many there are.

    that said, I just use an aftermarket masterlink on my Shimano chains.

  10. #10
    AEO
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    I think it was on one of the manuals for my chain pins or something, I can't find it (who keeps around those small manuals?), but the closest I could find is here:
    http://www.parktool.com/repair/readhowto.asp?id=25

    Shimano® Chain Service Procedure

    a. Select a chain rivet identical to adjacent rivets. Do not select a previously installed connecting rivet, or a rivet immediately adjacent to a connecting rivet. Avoid selecting the special connecting rivet, and avoid any rivet that looks different from the others.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

  11. #11
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    Bump

  12. #12
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    Wouldn't worry about how many pins you have used, as long as they are only the specific Shimano ones desiged for the chain.

    would have concerns depending on why you needed fix the chain multiple times.

    If it was for cleaning, would look at an on-bike solution, spray degreaser is great for this.

    If re-pinned due to breakage, would consider replacing if it was breaking regularly (by that I mean every 2-3 rides), if ones every 6 months say, not such an issue, but would still look at replacement.

    From how you are describing the need, from swapping parts between frames, can't see any issues this would cause, the assumption here, is that you are keeping the chain with a specific cassette, would only get concerned with the cost of it, as the rivits (shimano pins) are normally quite expensive; using a removalbe link from SRAM / KMC would be a good choice here.

  13. #13
    coprolite fietsbob's Avatar
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    You should replace the chain to extend the wear life of cassette and chainrings,
    may be time or already a combination must be purchased.

  14. #14
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    Thank you. I've just been swapping due to changing parts over between frames

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