Sidewall deflection and Rim\Tire size questions?

[Ron Sutton]

These are my Star Spec Z1's in action 255/40-17 on 17x9's. I had some 225/50-16's on 16x7's but they were not sticky and rolled over like pigs.

You have a double win going on there. The tire's sidewall & tread are performing at optimum with minimal sidewall deflection ... to achieve and keep ... optimum contact patch during the run.

And ... your front end geometry is really dialed in to achieve the optimum dynamic camber (KPI, caster & static camber combined in action) when the car is turning both directions.

Nice work & good decisions !