Being that I spent over 3 hours trying to find a good combination for tire replacement, I thought this might be helpful to someone else. I have the OEM 19" rims and wanted to know what alternative size would be best. I went with 255/40/19 in the rears and 245/35/19 in the fronts. The tire I bought was the Sumimoto HTR ZIII. They blow away the Potenzas even when they were new. Traction is vastly improved. The traction control now is not being overly sensitive like with the Potenzas. Also ride quality has improved even with the pressure set at 45PSI. Tread Wear is rated over 300, so I expect longer tire life then the Potenzas (140Tread Wear)that lasted only 16K miles.
Initial sporty driving brings plenty of pleasure with these tires. Complete out the door price was just over $1000 for the set of four.
Avion