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Is this a cracked rim????

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Is this a cracked rim????

Old 05-21-14, 08:07 PM
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Is this a cracked rim????

Weinmann/Etro 622x15 alloy rim. Is this a crack or just a 'joint' in the rim? not very great camera. thanks.

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Old 05-21-14, 08:09 PM
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Joint
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Old 05-21-14, 08:17 PM
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Absolutely.
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Old 05-21-14, 08:21 PM
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Actually both. The joint in this case is also a crack as it's not been welded together. Andy.
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Old 05-21-14, 08:26 PM
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"Joint, absolutely, actually it's both". Means nothing to me. COME ON FOLKS, WHICH ONE? Be clear. Is the wheel damaged? Or just cosmetically odd looking. I've been riding on it and went to change tires and saw it. So really, lets have something exact. Can I use it or need to replace. thanks.

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Old 05-21-14, 08:51 PM
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It's ok to use.
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Old 05-21-14, 08:55 PM
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Yep, just the joint. I've got 2 sets of Sun Rhyno Lite rims, each of which has a visible joint just like that. They weren't very apparent at first, but as I put miles on the wheels they became noticeable. One wheelset has been retired to backup status, the other still being used on trails. With my 225 lb butt riding over rocks and roots, if it was a problem the rims would have come apart by now.
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Old 05-21-14, 09:03 PM
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It's a joint.

Be real, you already knew the answer, but didn't take a moment to think.

What are the odds of a perfectly straight and square crack occurring exactly centered between 2 spokes opposite the valve?
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Old 05-21-14, 10:59 PM
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As Francis says. Do you not recognize the smiley face after my post? A crack is a void/separation/gap/break (although not here) between two sides/ends/within a otherwise continuous piece. A crack can be intended or indication of failure. Andy.
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Old 05-21-14, 11:38 PM
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Originally Posted by Andrew R Stewart
As Francis says. Do you not recognize the smiley face after my post? A crack is a void/separation/gap/break (although not here) between two sides/ends/within a otherwise continuous piece. A crack can be intended or indication of failure. Andy.
A crack can also be comment with a bit of intended irony. Very apt on this thread.

I won't make any cracks about joints here, though it's hard to resist.
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Old 05-22-14, 12:31 AM
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In some places, crack is illegal, while joints are legal.
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Old 05-22-14, 08:21 AM
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Originally Posted by rdlange
Weinmann/Etro 622x15 alloy rim. Is this a crack or just a 'joint' in the rim? not very great camera. thanks.

How, exactly do you think they make rims?

Two ways to join an extrusion. Pinning-like yours, or welding like this:

How Bike Rims Are Made | adventure journal
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Old 05-22-14, 08:25 AM
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Originally Posted by BikeWise1
How, exactly do you think they make rims?

Two ways to join an extrusion. Pinning-like yours, or welding like this:

How Bike Rims Are Made | adventure journal
You mean they're not cast in a solid loop?
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Old 05-22-14, 08:32 AM
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Originally Posted by rdlange
"Joint, absolutely, actually it's both". Means nothing to me. COME ON FOLKS, WHICH ONE? Be clear. Is the wheel damaged? Or just cosmetically odd looking. I've been riding on it and went to change tires and saw it. So really, lets have something exact. Can I use it or need to replace. thanks.
It's a JOINT!!!. Is that clear enough? Andy's comment was facetious but what he meant was that that joint is also an intentional separation in the rim since the joint is pinned, not welded.
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Old 05-22-14, 08:32 AM
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Originally Posted by RPK79
You mean they're not cast in a solid loop?
You're kidding, right?
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Old 05-22-14, 08:34 AM
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Originally Posted by BikeWise1
You're kidding, right?
Yes.
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Old 05-22-14, 08:46 AM
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Originally Posted by RPK79
Yes.
Having been in this business for 30 years, nothing surprises me. hahaha

I've had customers think the most outlandish things!
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Old 05-22-14, 08:52 AM
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Originally Posted by RPK79
You mean they're not cast in a solid loop?
They are machined from a solid chunk of billet.
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Old 05-22-14, 08:57 AM
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Originally Posted by 02Giant
They are machined from a solid chunk of billet.
That makes more sense!
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Old 05-22-14, 09:25 AM
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Originally Posted by Homebrew01
In some places, crack is illegal, while joints are legal.
My joints crack, if I've sat still long. Does that make ME illegal? Or is it OK as long as I refrain from bending?
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Old 05-22-14, 09:30 AM
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Originally Posted by 02Giant
They are machined from a solid chunk of billet.
All joking aside, that is an interesting concept.
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Old 05-22-14, 09:43 AM
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Originally Posted by leob1
All joking aside, that is an interesting concept.
As in how can we make rims that waste the most material ?
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Old 05-22-14, 09:49 AM
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Originally Posted by Homebrew01
As in how can we make rims that waste the most material ?
I said interesting concept, not easy, practible, cheap, lighweight, etc.
You could machine just the rim, or a disk, or anything in between. Interesting.
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Old 05-22-14, 10:02 AM
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Old 05-22-14, 10:28 AM
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Originally Posted by 02Giant
They are machined from a solid chunk of billet.
It must be a big lathe.
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