This is something that I have thought about a bit. As crazy as it sounds, my cars setup really leans towards a radial style. The sidewall of the redline is pretty stiff and a radial car is usually under tired for the power level. I haven’t been able to dynamically test my therory, but I did static contact patch test it. So if changing the sidewall from vertical to slightly angled out helps soften the stiffness won’t pulling the bead in the same amount do the same thing? The difference between pulling it in and pushing it out. You need more tire pressure pushing the bead out and less if you pull it in to maintain the correct contact patch. I inked up a 4.5 inch rim and a 5.5 inch rim with the same tire. I was able to run 18 lbs with the narrow rim to maintain the contact patch and got 1” longer patch. (Only way I can increase it). I had to run 20 lbs in the wide rim to maintain the contact patch, left to right. I haven’t had 4 tires with similar tread depth to be able to test my theory yet.
