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Question About Surface Porosity on Wheels

MidLifeCoyote

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Looking for opinions from the community if this indeed normal and I am too concerned, or if this is not normal and should be of concern.

PLEASE NOTE: I will not be naming and shaming. I will not post what wheels these are nor the manufactuer.

I received 4 wheels and upon inspection, I found 3 of them have surface porosity on the inside drum (where tire air would be) and on the tire bead contact surface. I contacted the company who asked for 2 of them back for inspection. They have now told me they believe this is normal and of no concern. Each of the 3 wheels have between 1 and 4 spots each. I have attached example pictures below with a q-tip for size comparison.

Please give me your opinions.

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Neggytive

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I would not accept them, even if it were cosmetic.

The only way to determine right now what is going on is to XRay the wheels

That is not in your budget or your responsibility.

Otherwise time will tell, and I have seen alloy wheels eat themselves from the inside out from water infiltration... gas stations that don't have water separators in their feed lines.

Ship them back
 

Skye

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They appear to be flaws from the casting or flow-formed molds.

I'm concerned they'd act as stress fractures, a weakness that could eventually crack and break.

That you've seen this many, you have no idea if those same flaws are internal.

It questions the mix of the alloy, the foundry, and their QC in-general.

I'd always be wondering, worrying, if something I cannot see is progressing to the point of failure.

I'd pass on these rims and this manufacturer entirely.

Thanks for posting. It's a good PSA for us to be checking our rims upon receipt.
 
Last edited:
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MidLifeCoyote

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Peoria Illinois
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2024 Mustang GT
I would not accept them, even if it were cosmetic.

The only way to determine right now what is going on is to XRay the wheels

That is not in your budget or your responsibility.

Otherwise time will tell, and I have seen alloy wheels eat themselves from the inside out from water infiltration... gas stations that don't have water separators in their feed lines.

Ship them back
They appear to be flaws from the casting or flow-formed molds.

I'm concerned they'd act as stress fractures, a weakness that could eventually crack and break.

That you've seen this many, you have no idea if those same flaws are internal.

It questions the mix of the alloy, the foundry, and their QC in-general.

I'd always be wondering, worrying, if something I cannot see is progressing to the point of failure.

I'd pass on these rims and this manufacturer entirely.

Thanks for posting. It's a good PSA for us to be checking our rims upon receipt.

Thank you for your replies. These were exactly my thoughts. I was looking to see if others shared my concerns.
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