Tire Wear / Adjustments

shb5007 · 05-03-2010, 07:01 PM

I ran my first autocross on my new Dunlop Star Spec tires a few weeks back.

I have a few questions about how my tires wore, and adjustments.

First of all I ran 45 pounds of air in all four tires.

My front tires wore well over the wear indicators.

The rear tires were well inside the wear indicators.

Is this a tire pressure issue? camber issue? or another issue?

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***GodLovesUgly*** · 05-03-2010, 07:16 PM

well you have to think about how much your motor weighs, it's gonna smash the tires down a lil more. up them in the front and lose some in the back.

use some chalk on the side walls to help indicate too.

it's kinda weird though, i would think star specs could go with less psi then 45?

what tire size are you running?

shb5007 · 05-03-2010, 07:23 PM

I am running 215/40ZR17.

It could be a front camber issue...

Was thinking about going to check out the alignment, but I think I am going to install new springs and struts and that will put me right back at the start.

shb5007 · 05-03-2010, 07:25 PM

EDIT...double post.

steve35svt · 05-03-2010, 07:26 PM

I've never needed over 38 psi with Hankook RS2's for front pressures. rear pressures were a couple pounds higher for rotation, but tire brands can react differently. The tires I ran couple weeks ago needed four pounds less in the rear too not to spin out.

shb5007 · 05-03-2010, 07:30 PM

If I recall correctly Scott was running 40 pounds in the front of his Star Specs on the same course in his Focus with some suspension work.

I am on a stock SVT suspension.

It was a pretty high speed course...

***GodLovesUgly*** · 05-03-2010, 07:38 PM

i thought camber was to make the tire wear more evenly? like the whole contact patch?

lol i dunno, that's why i'm LearNing..

***bringler26*** · 05-03-2010, 11:59 PM

Don't take this wrong but you could be way over driving your car into a corner. If you are plowing into a turn and keep trying to turn harder you would be rolling the sidewall more. I have never seen you drive but its what I was taught when I was and still am learning.

shb5007 · 05-04-2010, 11:37 AM

Quote:

Originally Posted by bringler26

Don't take this wrong but you could be way over driving your car into a corner. If you are plowing into a turn and keep trying to turn harder you would be rolling the sidewall more. I have never seen you drive but its what I was taught when I was and still am learning.

No offense taken, could very well be true. I am new to all of this! :)