Recommendation. Change the pressure to 26PSI when they are hot. You will notice a world of difference in how the car tracks, corners an rides. The tire wear is also as it should be at this pressure. I believe it to be the optimum pressure for use with this tire on the Solstice.
Hard to tell from the posted photo but if he is on stock rims, as are mine they do not protude past the fenders as I have that same size which i believe is the stock size for the vehicle (i don't know what the "XL" designation is at the end of the part number). Here are the indy 500s on my car with stock rims.