Well here are my options.

I can run my stock si wheels with my stock tires( not sure what brand) lowered to about 20-22 psi

Or I could use my rays gram light 57cs (17 inch), with yokohama parada spec 2 tires with normal tire pressure.

Which tires set of wheels should I use to run the best times, I could lower the psi on the spec 2s but I dont think you can lower the pressure much on low profile tires?

Plus the gram lights are pretty heavy compared to the stock wheels, but they are almost brand new tires on them.

 

i would say get a good DR for your Si's .205-50-15 or 225-50-15 depending on setup.