CRex

Good point, but these things get plenty greasy past 34psi. Do you run Hoosiers? I wonder if the grip somehow comes back as they get to the supposed "sweet" spot of 36ish psi...

Veloce Raptor

Despite what people are told, in various around the paddock, the only way to really determine optimum hot temperatures is with a probe tire pyrometer.

916, yes, buy as many Z214's as you can. they are fantastic.

Falcondrivr

I'm one of the other 9 that Rokket was talking about. One tire was as bad as the pics above. Yesterday, I started moving my wheels around and noticed the other rear has a small section starting to do the same thing...so mark me down for both rears bad.

Brian_77_3.6

VIR June 2012. Delaminated R6. Pressure 36lbs.

Eifeler

Has anyone experienced this problem on a lighter car, say less than 2,400lbs?

KOAN

Dave,

What is a Z214?

Veloce Raptor

Hankook Z214 tire. Competitor to R6.

KOAN

Unfortunately, they don't come in 6GT3 sizes. Maybe some day...

Chaos

Hoosier REALLY needs some competition!

KOAN

Gregg,

I wanted to mention how much I appreciate your contributions to the "hit" list.

Plavan

I have not seen them on my race car. But it is unsettling to see here. I use R6's 245/50 R15 front, 275/50 R15 rear. My car weighs around 2100 with me in it. I like 32 hot.

Are these tires that are having problems all the same size?

morsini

I've been told, since I also had this problem, that it's the starting pressure that's causing the problem and not the running or hot pressure. To solve it I start them at 36-38, warm them up and then come in and bleed them to 36 psi. A PITA for sure, but no problems since.

Also, the load rating on the 285/35 R18’s that I was using is lower than that for the 295/35 R18 R6 that’s almost the same width.

analogmike

Low 30s hot are TOO LOW for a car over 2500 pounds. You would have to start at the low 20s and that could damage the tire. My 2300lb car is fine at upper 30s to 40, which is what Hoosier recommends.

24Chromium

I think you may be right.

I'm far too lazy and never inflate the tire on the morning of day two. I just leave it overnight from the prior days last session. Then the next morning is cold, pressure is probably down in the low 20s and there you have it.

I guess I'm going to have to change my habits.

tcracer

yep