Snowwolfe

Having an issue with an after market wheel for my C7. So far so good with the customer support so that's not my complaint. In the process of having one wheel replaced and today I removed the "bad" wheel (right front) from my car. I looked inside the barrel and noticed someone took the grinder to the wheel in 3 different areas. And this is on a chrome wheel.
Why would they grind it?

Kent1999

static balance issues?
imperfections in the initial casting? (grind away surface irregularities)
Maybe a hole or low spot that was filled, and then the excess ground off flush?

Hard to say

JoesC5

A sharp nick, etc can be the source of concentrated stress. By removing the stress point through grinding, there is less chance of stress concentration at that point, thus less chance of a crack starting at that point, meaning less chance of a wheel failure due to a crack forming.

Snowwolfe

Maybe these will help




Deferring to people more knowledgeable than me. I thought the grinding was to make sure they balanced good.

Kent1999

since its right at the root of the spoke -- a critical area for stress, maybe there was a stress riser there that needed to be removed (as JoesC5 explained)