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Old 03-24-19, 01:50 PM
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Originally Posted by Alcanbrad View Post
I would not expect that there would be any stress concentration on those inner holes, so those cracks are puzzling. The cracks radiating from the spoke nipple in the last picture is not an uncommon failure for an alloy rim with the stresses of weight and distance. I routinely check our wheels for the later but will have to inspect the innards next time I change tires.

I would be interested if Spinergy has any explanation.
Yeah, the outer cracks are odd. Keep in mind that rims are often pinned with a but joint at the seam, and mostly heald together with tension from the spokes.

The only explanation that I can think of for those outer cracks would be repeated lateral flex of the wheel. Out of true? Standing and leaning?

That is, of course, assuming they are actual cracks in the metal.
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