the suspension is setup for runflats? umm, that's one thing i am not very sure about

 

I wish Primacy MXV4 is available for GS350. Stiff sidewall. Handling very well in wet & snow road.
Have you tried to pump up a couple more Psi and see if the car handles better?

 

I dumped mine and got the Michelin Pilot Sport A/S Plus and the car rides better, handles better, and brakes better. They are superior. I do not understand how your car can handle so badly after using the pilot sport. If they are properly installed, inflated, and balanced I think there may be another issue with your vehicle. I do not know about the ones you put on your car, but the ones I have are directional tires. May check to see if they were definitely installed correctly.

 

Bridgestone Turanza SERENITY

 

honestly, i am amazed at the difference you guys feel... when i exchanged my runflats for winter tires (forgot what was it, but it was well rated premium tire), sure i could feel the difference but in reality, was it night and day?

 

I have a Gs300 with 17 inch tires. I am putting on Cooper tire Cs4. Nexus advisor agreed perfect for my car with V rating as opposed to w rated stock. I won't be driving at 142 mph so ill be just fine.

 

Bridgestone Serenity. I put them on my GS 350. Great tire. Also had them on my previous Infiniti G35