I have an 05 Crossfire Roadster with the upgraded Startech/Brabus wheels.
I have just replaced all the tyres with Pirelli ones.
The car now feels like it is driving ice.
It is very twitchy and generally feels unsafe.
Chrysler tell that the tyre pressures should be 32psi front and 33psi rear.
This is the pressures for the standard size tyres.
We have fitted, 225/35/19 front and 255/30/20 rear.
Can anyone help?

Many thanks

 

I would suggest checking the tire sidwall for recommended pressures or ask the folks that installed the tires for their advise.
My two cents

 

I would warn against looking at a tire sidewall for pressures on ANY car, look at them an tell us is says it's probably way too high. If it wasn't so cold tonight I would check what the standard tires say.

Try a couple psi less than what you have in now, then a couple more - see what seem best, and like you have done see if anyone has experience of those sizes on the Crossfire. My guess is a little less will feel better, it shouldn't be very different to the stock, the hieghts and profiles aren't a million miles apart.

Some more info might help - whats the temperature / climate like, what sort of roads were you driving your bobsleigh on?

 

go to a local big tire shop tell them to fill them up with hydrogen its like 15 dollars and once you get the correct psi they will never run low again, they will stay at that psi they even claim better mpg.

 

I think you mean Nitrogen, Hydrogen would leak faster and be dangerous.

Nitrogen leaks out of tires about 30 percent to 40 percent slower than air, according to Ingersol-Rand Co., which makes nitrogen inflation systems. And it doesn't hurt anything to pump regular air into your nitrogen-filled tire.

 

Shelby mustangs come originally equipped with nitrogen tires

 

But it might make it faster, since it would be a little "lighter on it's feet"

 

Personally I'd go with "Helium", same light feeling, but you don't have to worry about them blowing up if you ever find yourself in Lakehurst N.J.

Remember, I'm from Akron Ohio, home of the "Blimp".