Is my NR RD bent?
05-30-17, 11:08 PM
#1
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Is my NR RD bent?
Also has some back and forth play at the hanger mounting bolt and a tiny crack next to the Pat '79.
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05-30-17, 11:31 PM
#3
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Yep. Now the question is, does it make any difference in the shifting?
05-30-17, 11:56 PM
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Originally Posted by davester
Yep. Now the question is, does it make any difference in the shifting?
You need to buy another NR RD, Narhay. No two ways about it
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05-31-17, 12:30 AM
#5
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Thread Starter
Hmmmmmm.
I did think long and hard about this but ended up committing an act of blasphemy. I'll update the thread maybe tomorrow.
I did think long and hard about this but ended up committing an act of blasphemy. I'll update the thread maybe tomorrow.
05-31-17, 05:27 AM
#6
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Originally Posted by Narhay
Hmmmmmm.
I did think long and hard about this but ended up committing an act of blasphemy. I'll update the thread maybe tomorrow.
I did think long and hard about this but ended up committing an act of blasphemy. I'll update the thread maybe tomorrow.
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05-31-17, 05:42 AM
#7
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I would straighten it.
Or get another NR.
Or get another NR.
05-31-17, 08:43 AM
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Bent differently, but reminds me of a unit I won on ebay a number of years ago, "pristine" , well almost, there was a gouge on the back side of the top knuckle, parallelogram was twisted ever so slightly, confirmed with a quick mounting. The gouge lined up with where the dropout would have made contact had the mechanism swung violently backwards.
Contacted seller, explained and return accepted without challenge.
Contacted seller, explained and return accepted without challenge.
05-31-17, 09:03 AM
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It'll probably work as well as an un-bent Campy NR RD.
05-31-17, 09:14 PM
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I know a few guys with clean used or NOS NR derailleur parts, if you want to go to the trouble of rebuilding or transplanting. Me, I'd probably go with a clean used piece.
05-31-17, 10:33 PM
#11
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Originally Posted by nlerner
It'll probably work as well as an un-bent Campy NR RD.
05-31-17, 10:59 PM
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Yes, definitely bent. However, is it just me or does the inner portion of the parallelogram not appear bent? If the main body of the RD is still in alignment with the chainline, I wonder if the outer portion of the RD body suffered a lateral impact. I realize nlerner was being sarcastic, but he may not be far off from the truth.
Probably not related, but still curious: Why does the RD show so much damage/scrapes near the dropout, on the inner-most portion of the knuckle, a couple cm immediately out from the hanger? That RD could tell some stories.
Probably not related, but still curious: Why does the RD show so much damage/scrapes near the dropout, on the inner-most portion of the knuckle, a couple cm immediately out from the hanger? That RD could tell some stories.
06-01-17, 07:19 AM
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I have seen the NR rear derailleur bent a few times, over the years. But, I don't recall ever seeing a Shimano, or Suntour, or Simplex bent in the same fashion. So, my question is, is this unique only to the Campy rear chain hopper? Also...
How would one go about straightening the bent portion? I have an early NR(pre 1969) rear derailleur that could use some straightening and just might give it a try.
How would one go about straightening the bent portion? I have an early NR(pre 1969) rear derailleur that could use some straightening and just might give it a try.
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06-01-17, 07:29 AM
#14
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Originally Posted by randyjawa
I have seen the NR rear derailleur bent a few times, over the years. But, I don't recall ever seeing a Shimano, or Suntour, or Simplex bent in the same fashion. So, my question is, is this unique only to the Campy rear chain hopper?
Suntour, Shimano, and others use U-shaped pieces for their parallelograms, which resist this type of bending better than the flat plates of the Campagnolo design.
How would one go about straightening the bent portion? I have an early NR(pre 1969) rear derailleur that could use some straightening and just might give it a try.
06-01-17, 10:03 AM
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Originally Posted by nlerner
It'll probably work as well as an un-bent Campy NR RD.
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06-01-17, 11:06 AM
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Originally Posted by gaucho777
Yes, definitely bent. However, is it just me or does the inner portion of the parallelogram not appear bent?
06-01-17, 05:01 PM
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Originally Posted by ecnewell
I thought that too, but on closer inspection I believe it is--less so than the outer portion, but bent. That being said, as long as the pivot points are still parallel at either end and roughly in the same lateral alignment that they originally were, it should function about as well as it did before. I'd think it would really be twisting that would be the main cause for concern.
06-01-17, 09:45 PM
#19
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I love it! I fixed the Simplex Delrin rear derailleur by employing the exact same method!
