serpent

Has anyone done this? Michelin does not have any 18" 30 aspect ratio tires, and when they do it's either ps2 or cup2s.
this is a 100% street setup. Not interested in any pirellis or cup2s.
I'm planning:
295/30-18 front ps2 tires
345/30-19 rear pilot super sport tires

B747VET

I’ve run both. Very different tires. But, both great tires. Not sure how they would interact as a team, but I just wouldn’t do it. Probably being overly cautious.... I assume they are Corvette formula PSS? Since you are street only the only
issue might be hydroplaning if you drive in the rain often??

djnice

No, but sounds interesting.

Bill Dearborn

You will be fine as long as the best handling tire is in the rear. If the rear tire doesn't handle as well as the front tires the rear can become loose sooner during extreme maneuvers such as an emergency lane change resulting in unfortunate spins. Just driving around there won't be a problem but you never know when somebody may force you to enter a sudden large steering input. That is when you can be bit if the rear tire doesn't handle as well as the front. You could drive for years with no issues but do you want to take a chance? I suspect the Pilot SS tires handle better but I have no actual knowledge that they do.

Bill

usrodeo4

When I was a kid in the late 60's/early 70's radials had just started becoming used on some of the higher end cars...I mounted 14 inch radials from my Dad's Mercedes on the front of my '66 289 Mustang and kept the bias plys in the rear just to see what it felt like...I thought she handled much better and seemed to help the understeer/plowing tremendously. I would say try it and see what you think. Just my 2 cents. But re: the Cup2's, I would personally go with them them over "street" tires just because really all I am concerned with is what does a tire feel like at loss of traction time and to me the Cup2's transmit what they are up to better then PS's or PS3/4's. When I had my 997 Turbo (~765+ BHP) she had a habit of breaking loose up around 100 mph when I was fully into the throttle and the Cup2's kept me alive several times by telling me what they were up to...again just my 2 cents.

serpent

I did a quick google search of Toyo r888 rear and different front setup and was surprised how many different car forums have considered and done it. Mixing completely different brand tires.

Anyways, I believe the pss is an evolution of the ps2. And the ps4s is an improvement. The tire is wide enough to where it can handle street driving and have great handling.

Yea, I'm gonna pull the trigger and report back. This isn't for a z06 but for a viper, figured I would ask you guys since cars are similar in power and layout. And more people here with experience in tire setups.

usrodeo4

the PS4S grips better both dry and wet then the PSS BUT the PSS has better feel at loss of traction time, which is why I like them...actually I am going back to Cup2's as soon as my PSS's need replaced because the Cup2's are even better at transmitting what they are up to at or near loss of traction time...my 2 cents anywho.

serpent

I went with ps2 front and pss rear. Since the set cost nearly $1800, i want them to last. I would get PS4S all around and thats what was on my forgelines, but i sold that setup and went back to the 18/19 stock setup.

If i ever decide to go heads in cam and have 700rwp, i would definitely go R888R for street use.
I plan to have a street setup and a road course setup, road course setup will be hoosier a7.

RWSjr

PS2 275/35/18 front. PSS 345/30/19 rear
for me and no complaints/issues at all.
Will go PS4s when time to replace...

serpent

theres no ps4s available for the rear size. Only in 20".

RWSjr

not true. 325 size in 19" available per Tire Rack