rickster997

I need new rear tires. Currently have MPSS front and rear. I read all over not to mix and match front and rear. Would the new 4S tires fall under the same rules? Wait until I need to replace all 4 to change?

mellowalex

I got my new tires put on today.
I got Super Sports in the Rear 305/30/19 from tirerack because they are on sale for $300 a piece, and went with 4S for the Fronts 245/35/19.
I was advised by my local porsche mechanic that it is totally fine to have different front and rears.

OKB

the car doesnt know the difference. the only problem would be if the other pair was severely worn and you put 2 new ones on

PelicanParts.com

+1 to what the other members said. I currently have different fronts than backs and don't feel a difference. I think as long as the thread pattern is more or less similar, you shouldn't have any issues.

dasams

Rickster: The posters above are ignoring seasonal temperature effects. Summer performance tires turn into hockey pucks at low temps while M+S tires maintain a fair portion of their grip. Winter tires are designed for cold temps and perform well. Google glass transition temperature if you want to learn about how polymers are affected by temperature.

I would be comfortable mixing front and rear tires if they were produced by the same manufacturer and were intended for the same use and temp range.

StormRune

I think you misinterpreted: OP said MPSS which are Michelin Pilot Super Sports, the predecessor to the Michelin 4S. They are both summer performance tires and are very similar. The 4S has a slightly more evolved compound but I'd think they'd be 99% compatible. They have the same wear, traction, and temperature ratings.

rickster997

Thanks for the input. I asked through chat on the Michelin website hthe rep said as long as you have the same on the same axle you are ok...

z3mcoupe

I am running in the PCA Auto X with some people who have the new 4S tire - so far the initial reviews are that the tire is not as firm on the edge as the OE Pilot Sport PS2. When my PS2's are all worn out (won't be long now... ) I'm going to order another set of them.

I'm very impressed with how they've worn, and the grip in the wet even with a much lower thread depth as they wear out. I've had three HPDE weekends and a handful of auto x's on them also.

Regarding the original question, I agree with the previous comment of same tire manufacturer and close compound/wear rating in that it probably shouldn't be a big deal, but I'd never put different tires on either ends of the car. I did it once years ago with really great fronts and a lesser quality rear tire and spun my car . Lesson learned!