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Seperated Rim Seam?

Old 12-08-22, 11:01 PM
  #51  
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Originally Posted by Miele Man View Post
No it isn't. The crack/line I posted about does not go all the way down the rim like the rim joint does. It's clearly a different area and possible issue.
Take another look at the photo without tire in the OP. You'll see same split on both sides in the exact same place with respect to the spoke.

Note. It's from the opposite, so mirrored.

It would stretch credulity beyond yield for a near identical, perfectly straight to form in the same relative position.

Besides, if you look close enough, you can see the gap close halfway down, with the closed seam still visible.
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Old 12-09-22, 06:05 AM
  #52  
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Originally Posted by FBinNY View Post
Take another look at the photo without tire in the OP. You'll see same split on both sides in the exact same place with respect to the spoke.
Another identifying feature of the rim joint (though it doesn't seem to be shown here) is that it's diametrically opposed to the valve hole.
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Old 12-09-22, 07:53 AM
  #53  
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Originally Posted by Soody View Post
I did not. This is interesting to me. So... the seam is not welded, and the brake track and hook of the rim are just held in place by a pin below and tension? That seems crazy.
When a tire is mounted and inflated, the joint is being pushed together, not pulled apart. Not crazy at all
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Old 12-09-22, 10:30 AM
  #54  
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Originally Posted by dsbrantjr View Post
When a tire is mounted and inflated, the joint is being pushed together, not pulled apart. Not crazy at all
Not to mention that spoke tension does this as well.
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Old 12-09-22, 01:18 PM
  #55  
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Originally Posted by FBinNY View Post
Take another look at the photo without tire in the OP. You'll see same split on both sides in the exact same place with respect to the spoke.

Note. It's from the opposite, so mirrored.

It would stretch credulity beyond yield for a near identical, perfectly straight to form in the same relative position.

Besides, if you look close enough, you can see the gap close halfway down, with the closed seam still visible.
Looks like I need a better quality computer monitor. Thanks.

Cheers
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Old 12-09-22, 01:21 PM
  #56  
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Originally Posted by dsbrantjr View Post
When a tire is mounted and inflated, the joint is being pushed together, not pulled apart. Not crazy at all
With my split rim the wheel was rideable until I deflated the tire and then the wheel tacoed badly and t he split in the rim got a lot bigger. With the inflated tire on the rim the split was barely noticeable.

Cheers
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Old 12-09-22, 03:03 PM
  #57  
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Originally Posted by Miele Man View Post
With my split rim the wheel was rideable until I deflated the tire and then the wheel tacoed badly and t he split in the rim got a lot bigger. With the inflated tire on the rim the split was barely noticeable.

Cheers
Well then it's really a good thing you didn't get a flat far from home or you would have been SOL.
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Old 12-09-22, 03:09 PM
  #58  
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Originally Posted by dsbrantjr View Post
When a tire is mounted and inflated, the joint is being pushed together, not pulled apart. Not crazy at all
Not quite. It's still going to flex like all rims do. Taut spokes lessen that some but not completely. Fact remains that the pins are clearly bent.
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Old 12-09-22, 03:15 PM
  #59  
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Originally Posted by Soody View Post
Well sort of. I wanted to use these wheels on a different, nicer build, with some new consumables, because they have good hubs. But with this flaw, even purely a cosmetic one, I will put them onto something much cheaper, aim for ~$50
If you're curious about my work/local market these are the bikes i'm currently selling:
https://www.trademe.co.nz/a/search?m...isting=6820063
A New Zealand dollar is about 60 US cents.
Some really nice bikes you have posted on that site. Much nicer than the one you posted a pic here of.

Let me just add that this wheel flaw is really more than cosmetic. Cosmetic or not, if you plan to sell any bike with those wheels, it would be unconscionable of you to not disclose that flaw, or any other flaw for that matter in a listing.
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Old 12-09-22, 03:20 PM
  #60  
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Originally Posted by JohnDThompson View Post
BITD, welded rims were the exception rather than the rule..
Wait, what? I have rims from the 40's and 50's that are welded.
Rims from the 70's- welded.
Rims from the 80's welded.
Pinning without welding was a way to make rims cheaper, they knew what was better.
I have 10 random wheels here, 7 of 10 are welded.
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Old 12-09-22, 04:25 PM
  #61  
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Originally Posted by Schweinhund View Post
Not quite. It's still going to flex like all rims do. Taut spokes lessen that some but not completely. Fact remains that the pins are clearly bent.
FBinNY pointed out in post 6 that the problem is not bent pins but rather that the ends of that rim extrusion were cut square and therefore could not be made to meet perfectly from the top to the bottom of the rim when it was formed into a hoop. The rim would look the way it does whether or not the pins were bent.
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Old 12-09-22, 04:47 PM
  #62  
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Originally Posted by Trakhak View Post
FBinNY pointed out in post 6 that the problem is not bent pins but rather that the ends of that rim extrusion were cut square and therefore could not be made to meet perfectly from the top to the bottom of the rim when it was formed into a hoop. The rim would look the way it does whether or not the pins were bent.
That's not it. the pins are bent. You don't have to believe it. I really don't care. it was pretty common with some of those old rims.
Yes. Bent pins.
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Old 12-09-22, 06:36 PM
  #63  
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What I believe happened, is an unplanned stoppie. If it wouldn't have had a tire bead holding it together it would have been catastrophic.
So dude is riding along and a unplanned emergency runs in front of him and he grabs a handful of brake, the front one.
Stoppie. Dude is still on the seat as the bike comes crashing down on the back wheel. For a strong highly tensioned wheel, probably not a problem. This wheel ain't that.
So the seam is at a 90° to the point of impact, and dude is not a little guy and his rear is driving the bike down. wheel distorts just enough to bend the pins.

Front rim would just require running into something firmly with the seam at a 90° to the impact.
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Old 12-09-22, 07:43 PM
  #64  
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Originally Posted by FBinNY View Post
FWIW - the problem is that the extrusion was cut square, so there was a bit of a missing pie wedge when it was formed into a circle.
Originally Posted by Schweinhund View Post
What I believe happened, is an unplanned stoppie. If it wouldn't have had a tire bead holding it together it would have been catastrophic.
So dude is riding along and a unplanned emergency runs in front of him and he grabs a handful of brake, the front one.
Stoppie. Dude is still on the seat as the bike comes crashing down on the back wheel.
So the seam is at a 90° to the point of impact, and dude is not a little guy and his rear is driving the bike down. wheel distorts just enough to bend the pins.
I invoke Occam's Razor.
A simple, plausible manufacturing event vs emergency "stoppie" resulting in wheel striking pavement, seam coincidentally at 90° to pavement, with a rider of a certain mass who doesn't know how to brake.
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Old 12-09-22, 08:43 PM
  #65  
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Originally Posted by sweeks View Post
I invoke Occam's Razor.
A simple, plausible manufacturing event vs emergency "stoppie" resulting in wheel striking pavement, seam coincidentally at 90° to pavement, with a rider of a certain mass who doesn't know how to brake.

Yes. A catastrophic event is more plausible than a one in a million manufacturing defect.
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Old 12-09-22, 09:34 PM
  #66  
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I think this could be schrodingers wheel where I both cut the spokes and scrap it, and ride happily on it for years more
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Old 12-09-22, 10:07 PM
  #67  
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Sometimes a thread reaches a point where people have very solid unshakable positions. Rather than argue or try to prove anyone wrong I invoke the spirit if Justice Brandeis who might have said, "the remedy for bad information is more information."

We've beat this horse enough and people can sort through the posts and decide for themselves what to believe.
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Old 12-09-22, 10:12 PM
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Originally Posted by FBinNY View Post
Sometimes a thread reaches a point where people have very solid unshakable positions. Rather than argue or try to prove anyone wrong I invoke the spirit if Justice Brandeis who might have said, "the remedy for bad information is more information."

We've beat this horse enough and people can sort through the posts and decide for themselves what to believe.
On this we agree.
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Old 12-10-22, 09:32 AM
  #69  
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Originally Posted by cyccommute View Post
Not an obvious marker of a low end rim at all. Even welded rims are pinned. I’ve broken down many rims for scrapping and they all have pins. It’s how the rim is held together so that it can be welded.
Should have been more clear. Pinned connections are not the marker of a low end rim. Pinned connections that leave a large gap like this are the marker of a low end rim.
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Old 12-16-22, 06:35 PM
  #70  
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Originally Posted by veganbikes View Post
Time for a new rim or a new wheel entirely. I wouldn't ride on that personally.
Wasn't aware this was the Chicken Little forum...

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Old 12-16-22, 06:36 PM
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Originally Posted by Soody View Post
I did not. This is interesting to me. So... the seam is not welded, and the brake track and hook of the rim are just held in place by a pin below and tension? That seems crazy.
Normal...par the course.

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Old 12-16-22, 06:37 PM
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Originally Posted by Soody View Post
What do you guys reckon about this?




Perfectly fine, not a problem.

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4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:

Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
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Old 12-16-22, 06:54 PM
  #73  
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Originally Posted by mrrabbit View Post
Wasn't aware this was the Chicken Little forum...

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After all the years here, how could you not be?
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