While swapping wheel/tire sets today I went to clean this black wheel I just took off and noticed this etching down the inner barrel center. The wheel was just freshly painted 2 years ago and certainly didn't have this marking after the pain job, but I am questioning if it was this last 5-6 mos of use on the car that did it or if I could have been prior. This did not happen on the opposite wheel while on the car. I did one autoX and one track day with PCA in the winter/spring. I'm dumbfounded.

The only thing I did not do was slap the wheel back on just to inspect clearance to the brake caliper. I had already tightened up the other set to the car and only saw this as I was cleaning the black wheels prior to stacking them up.

Thanks,

 

Rock, stick, or twig, stuck in between your caliper and inner barrel, or rubber "clag" build up. Not uncommon.

 

Yes thanks. 1st time Ive had that and your input is confirmation on what others have said. WOW!

 

rock jammed between the caliper and the rim