Pirelli P Zero Corsa Size Question for 996tt
 

Pire

Sorry not to be able to answer your question, but are you sure about the front-tires size? 235/40ZR18? Shouldn't it be 225/40ZR18? That's the size I'm currently using. :confused:

Greetings,
--Pierre

http://www.flat-6.net/phpBB/uploads/42014947.jpg

[quote]Originally posted by cjv:
<strong>Question is if I use the 315's instead of the 295's, what will the affect be on the handling characteristics of the car? :confused: </strong><hr></blockquote>

The wider rubber on the rear should give you quite a bit more stick. This means, less oversteer and possibly more understeer. Depending on how your car handles now, you may want to reduce or increase one or the other. For instance, if the car understeers a bit, put more rubber in front while leaving the rear alone.

One thing to note, however, is the fact that the Corsa is far stickier than the street tires. This means that you may or may not be able to get the same balance front and rear as the street tires.

Here are some dimensions for the Corsa:

225/40-18 = 25.00"
235/40-18 = 25.40"
255/35-18 = 25.03"
265/35-18 = 25.35"
285/30-18 = 24.92"
295/30-18 = 24.97"
315/30-18 = 25.44"

Pierre,

Can you please tell us what you think of the P-Zero Corsa?

Chad,

Yes, more rubber = contact patch. As to what size front tires to use, I am afraid the 255 is too wide for the front and may cause the car to track poorly. You may see that you are always fighting with the steering wheel even in a straight line. Personally, I wouldn't go with anything bigger than stock sizes especially since these are much stickier than street tires. However, if you really want to put more rubber under there, try the 235/315 combo. That should be reasonable enough and give you plenty more grip.

As to the aspect ratios (35 vs. 30), it doesn't make any difference as long as the overall diameter of the tires are within reasonable limits.

Chad,
I think the set up (235/315) would be fine. You can go larger up front, I have seen 275, but don't think it is neccesary. Your car has enough suspension adjustments that you don't have to adjust tire sizes just to get a certain balance. You can dial in some more rebound or tighten the rear bar to change to more oversteer.

[quote]Originally posted by cjv:
<strong>Given the above information and the fact all the above tires will fit, what would be your choice and why?</strong><hr></blockquote>

Personally, I don't think an 8.5" wheel is too wide for the 225. In fact, an 8.5" wheel would spread the tread a bit more which could help reduce understeer. As such, I would be tempted to stick with the stock sizes. The reason for this is because I don't think I would be able to break these tires loose. However, that's just me.

Off Topic..

Viken, I got a question for you :) A friend who owns a Ferrari Modena was intersted in replacing his assimetricos with corsas. He wants more grip, or so he says, so do Pirelli make a size for the 360 Modena ? or, in you experiance, you think he's better off sticking to street-oriented rubber? He's not planning any suspension mods. Is it the way to go or not? thanx :) By the way it's a stock 2000 Modena with Tubi's.

[quote]Originally posted by 02-targa911:
<strong>A friend who owns a Ferrari Modena was intersted in replacing his assimetricos with corsas. He wants more grip, or so he says, so do Pirelli make a size for the 360 Modena ? or, in you experiance, you think he's better off sticking to street-oriented rubber? He's not planning any suspension mods. Is it the way to go or not? thanx :) By the way it's a stock 2000 Modena with Tubi's.</strong><hr></blockquote>

The 360 Modena has plenty grip with the stock tires. However, the four different tires installed at the factory do not offer the same amount of grip. If he wants the best, he should consider the Goodyear Eagle F1 Fiorano. This tire is as close to an R-compound as he can get in the stock sizes. The Bridgestone S-02A is a close second with the P-Zero and the Pilot Sport in 3rd and 4th.

<a href="http://www.tirerack.com/tires/tires.jsp?tireMake=Goodyear&tireModel=Eagle+F1+Fiorano" target="_blank">Eagle F1 Fiorano</a>

https://www.tirerack.com/tires/image...1_fioranno.jpg

Thanx alot Viken, I knew you'd have the answers :)