[swisstyphoon]

I’m honestly starting to think MT ET Street R consistency is a bit hit or miss lately.

I ran into very similar issues on my setup. One of my ET Street R’s needed a huge amount of weight on one side and had visible wobble/runout even after multiple re-mount and rotation attempts. The wheel itself checked out true on the balancer.

You could even visibly see the tire moving side to side while spinning on the balancing machine.

At higher speeds the whole car would shake badly — over ~120 mph it honestly didn’t feel safe anymore.

What’s interesting is that the second tire was noticeably better, which makes me think it’s not just “normal drag pack vibration” but more tire-to-tire inconsistency.

I recently switched to ET Street S/S for class rules and even there I’m seeing one tire behave much better than the other.

So no, I don’t think you’re crazy or alone with this issue.