Tire Question.

[Aceblade]

Recently acquired a GT350. I’ve been doing a lot of searching and reading but I still have questions. The car I purchased has the PSC2’s on the front in the OEM size 295/35/19 but the rears were replaced with PS4S’s in 315/30/19’s. I live in SC and the weather here doesn’t get super cold but it can some days get into the 30’s and we do get our fair share of heavy rains from time to time so I’m faced with a dilemma. FYI I daily this car.

A. Should I replace just the fronts with PS4S in the OEM size and not touch the rears even though I know the rears are a little smaller and are throwing off the speedo?

B. Should I replace all the tires with the OEM PSS?

C. Just keep driving the car and take it easy in the rain or on cold days till the tires wear out to maximize my dollars?

D. Move the PS4S to the front if they fit and get a larger rear tire? Is that even possible or worth it?

E. I loved my Continental Extreme Contact Sports but see no other tire company, except for Nitto, make the OEM sizes. Could I get into Continentals and if so what size would be similar to the OEM’s that they make or just stick with the Michelin’s?

F. Or just get PSC2’s for the rear but be extremely careful when cold or wet? Knowing I’ll be replacing tires again next year

No one wants to buy a new to them car and put new tires on it so I’m contemplating all options before making a decision. As some will ask what is the main use of the car? Well I’ll daily it and maybe twice a year I’ll HPDE it.
Thanks in advance for the input!

 

[JP X]

If you are just talking about daily driving, I say ‘A’. Those PS4s are good tires.
If you want track tires, there are some good threads to search on this site. Also, look at what people are running at your tracks on the Lap Time Thread.

 

[o-man]

I'm with JP-X. PS4 all the way around. BTW, the rears are .5 inches TALLER than the fronts

 

[Dave_W]

Are you asking for daily driving or track driving as well? For daily driving, just run what you've got until they wear out - option C. Tire Rack categorizes the 240 treadwear PSC2 as "Extreme Performance Summer" and the 300 treadwear PS4S as "Maximum Performance Summer" so they're pretty close in performance - it's not like you're mixing track tires and all-seasons. For the performance of the car and tires, if you push the car to where you'll notice a difference in the tires, you'll probably be looking at a hefty speeding fine. At least in the dry and probably in the wet as well.

Honestly, for your first track day, I wouldn't worry about it, either. The staggered widths will compensate a bit for the difference in compounds, and you should be paying more attention to running the correct line and getting braking points down than to pushing 10/10ths. I'd worry more that you've flushed the brake fluid with good product and have decent brake pads. Buckle in and send it.