Ok, so I went from Azenis to R-compounds in september, granted I wasn't using brand new rubber, pretty old in fact, and now I'm running on lightly used Hankook Ventus R-compounds. The thing is, in Nov. I don't think I ran enough pressure(30 psi all around cold) and after 2 days of running, I put the car up on a jack and noticed I was down to cords on a spot on the inside of the right front tire. The track I was running on was run CCW, so obviously the right front got a lot of the heat, but it was only going up to about 34 hot. The thing is I don't understand how that happened, I'm just doing HPDE's and frankly I'm not as fast as some of my friends I run with yet they have no tire issues.

Fast forward to last weekend, I towed my car out to Streets of Willow in California, which we ran CW, again had a great weekend but this time I ran my tires at 36 cold front and 38 cold rear, the pressures after a session were usually around 41 hot front, 40 hot rear. I didn't notice until tonight when I put the car up on jack stands to pull the tranny and when I looked at my tires I noticed the left front this time was down to cords on one spot.

So what I'm asking is this, what am I doing wrong? What pressures would anyone recommend. Any help is appreciated.

 

i do relize you run a crx but try, 32lbsF and 30lbsR worked great for us

 

does it matter what wheel size?

 

ooo i dunno, could this be a sign that your car pushes really bad and that is why the one tire sees more wear then the others?

 

I don't understand why it would be pushing tho?

 

could be many things, your cars setup, to name the most obvious. maybe alignment issues, i dunno im just throwing out ideas

 

what about suspension?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PSUCRX &raquo;</TD></TR><TR><TD CLASS="quote">what about suspension?</TD></TR></TABLE>

maybe you car's setup makes it prone to understeer, something along those lines, maybe the way you drive the car it understeers

 

I have 1/8 in. toe out...and probably 1.5-2.0 deg. neg. camber in front

 

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I'm no expert, but could those toe settings, on a roadcourse, be direct the cause of your inside wear problems? Maybe you should consider running 0 toe?

 

from what I have seen, and heard, 1/8 in. toe out is very much a normal set up on a track car.

 

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I'm no expert, but could those toe settings, on a roadcourse, be direct the cause of your inside wear problems? </TD></TR></TABLE>

Nope. I've got almost 1/8" per side, no problems with wear here. I ran the hankooks at 38 or so hot, rotate after each day on track.

 

You getting a lot of wheelspin when exiting corners?

BTW, if the event doesn't change from clock--&gt;counter clock, I
usually rotate side to side to even the wear out for the day.

 

Could be that you started beating on the used tire as it started to fall off in grip, as Hankooks are prone to do as they wear.

Actually, if they're used, you might just need to rotate more often! R-compounds wear faster!

 

If it's just in one spot it could be due to brake lock-up. If they are already worn it doesn't take much to cord them and R compounds won't make a lot of noise when you lock them up like the azenis will.

 

If you could post a picture or two of the wear, we would be able to help more.

If the tires are corded in just one spot, probably a locked up wheel. If the cords are showing in a circumferencial pattern, may be just normal wear or could be a camber issue.

Some tracks are extremely hard on one tire. Blackhawk Farms Raceway, for instance, is very hard on the front left tire on my ITC CRX. This is due the the layout and so many right hand turns. May just need to rotate the tires more often.