my 295 PS2's do ok I guess.

I think I was expecting a lot more though so I feel a little let down. They're vague in the corners compared to some other tires because the sidewalls flex more.

the inside of the tire is developed more for wet traction and the outside of the tire is developed more for dry traction. Kinda sucks though since the Z has some camber going on in the rear so your contact patch is the more of the wet traction part of the tread

you guys really need to check out the tire size calculator

Also keep in mind that wheels that are different widths by .5 inch increments have an effect on the same tire by varying the buldging by .2in (5mm).

So a 9.5 rim with a 285 tire will be .4 inches less wide (at the bulge, not tread) than that tire on a 10.5 rim


BTW, why isn't this thread in the wheel/tire section? What's with all the 275mm tires with 400+hp FI Z's? Why does everyone go for those sizes? Is it the wheel choices? Is bling more important than traction? Did people make a consious decision to get a 275 and not a 295?

 

ANYBODY??????????????????

 

I'm not sure that a 305 tire would fit on a 9.5 wheel but I could be wrong.

 

In VRT's defense they say they have and that it works fine. From my own experience Im running a 285/35/19 on a 9.5 +33 offset. Rule of thumb is you can go 10mm wide and reduce the side wall by 5% and you should not affect the overall tire diameter or width to much. I think by the way the 285's fit that a 305/30 should fit and have a normal buldge like on some cars. I'll know if about 2 months when my tires are gone.

 

I think its more of an issue of fitting the tire in the fender well with the very aggressive offsets that look good on our car. On a 19x10.5in +24 or +22 offset wheel, once you go higher than 285 you're going to be cutting or rolling fenders. Also, if you address camber it's just going to be that much of a tighter fit. Most folks will only compromise on looks so much.

 

Some useful info here and a couple of great calculators; the second one should be able to answer your question

http://www.carbibles.com/tyre_bible.html

 

Just a quick note for everyone. I think i said it before, but you know that the wider you go with your tires, the more you have to lower the pressure in your tire in order to keep the same contact patch, or improve it. If you go too wide you will get to the point where you you have no air in the tire (exageration, but you get the point).

 

Uh, OK. Where did you get this info?

 

I think i remember somebody in this forum posting a really good website about tires and wheels. It actually makes sense, because as you increase the width of the tire, you are distributing the weight of the car over a larger area, and therefore less pressure on the ground, and therefore less contact patch. So to overcome this you have to reduce the pressure in the tire to actually increase the contact patch.

 

If you checked the link I posted a few posts back about in 'Fat or Thin - Contact Patches and Grip' section of that you'll see that the area stays roughly the same but the profile (shape) changes when you change tyre width

If you lower the pressure in either case, you will get more contact area

 

That's the one, i knew it was something along those lines, thanks for clearing that for me

 

Not F/I yet but I will be running 315s and probably 335s when I get money to buy another set of wheels for track use. The wheels I got now are just way to pimp and I got a deal too good to pass up with them.