Yes, I don't plan on changing any geometry besides adding the spacers. So, I just wanted to make sure that my intended setup would not rub. That's why I wanted to know how much the tire is tucking in towards the center of the car under compression to give myself an estimate of how far out I can go.i hadn't considered that... I assumed this person is pushing the wheels away from the chassis via spacers and wants to make sure the tire won't crush into the bodywork. I'm planning to do the same thing (and test the same way) as I described earlier.
Yes, I don't plan on changing any geometry besides adding the spacers. So, I just wanted to make sure that my intended setup would not rub. That's why I wanted to know how much the tire is tucking in towards the center of the car under compression to give myself an estimate of how far out I can go.
This isn't really an answer but there are quite a few cup guys running spacers. I highly doubt something hugely detrimental is happening when doing this. Also, the hubs on this car are sourced from another production vehicle, which I believe weighs twice as much. Doubt the hubs will notice the difference, but I'm certainly open to some education otherwise. I'm not debating whether things change at all, I'm just asserting that outside of rubbing various pieces of bodywork,small spacers (lets say 9mm or less) will not have much of any affect.