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Old 02-10-09, 08:46 PM   #1
Disco Stu
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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.
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Old 02-10-09, 08:55 PM   #2
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yes, it could.
why not just get some sram gold QR plates? they work perfectly with shimano 9sp chains.
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Old 02-10-09, 08:59 PM   #3
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Hmmm, good idea.
Thanks.

But how many is too many pins?
Half a dozen?
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Old 02-10-09, 09:28 PM   #4
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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
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Old 02-10-09, 09:31 PM   #5
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Right.
Thanks
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Old 02-10-09, 09:32 PM   #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.
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Old 02-11-09, 11:44 AM   #7
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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.
The OP may have been removing/replacing pins as part of chain cleaning.
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Old 02-11-09, 11:58 AM   #8
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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

How did you come up with that formula?
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Old 02-11-09, 12:40 PM   #9
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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.
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Old 02-11-09, 01:11 PM   #10
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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

Quote:
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.
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Old 09-12-11, 10:42 PM   #11
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Bump
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Old 09-13-11, 12:39 AM   #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.
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Old 09-13-11, 01:08 AM   #13
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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.
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Old 09-13-11, 10:33 AM   #14
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Thank you. I've just been swapping due to changing parts over between frames
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