I first posted this on a Vette site, copied and pasted....

On my Vette I have 43K miles, OEM GS-C's and the 255 fronts are worn about 1.5" in
from outside edge. Rest of tires have plenty of tread, but will have to change fronts soon
due to almost no tread in said area.
Suspension has never been touched.
30 psi. Tire cannot be rotated on 1995.


My 1986 Z28 has over 200K and has gone thru 4 sets of tires approximately every 50K.
Same problem here (1.5" worn from outside, rest of tire with much tread left). This car
you can rotate in X pattern, so the tires wear out at the same time. Car has never had
an alignment. Shocks were changed at 130K. Been doing this since day one.

I had a 1993 Z28 before the Vette. Change tires (245 GS-C's) at 41K, same problem.

What can I do to change this?
Adjust camber/caster?
Add more air?

Is this a coincidence with three cars doing the same?

Could it be my driving habits?

Thanks!


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1986 Black/Gold LG4 Z28
Original Owner, 200,000+ near trouble free miles.
Mostly Stock.

1995 Dark Red Metallic Corvette Coupe Original Owner

 

Hard cornering will wear down the outer edges on the fronts as well as not enough negative camber. I'd run more like 35 rather then 30 psi too. It will help you keep off the sidewalls more under heavy cornering.

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-Justin-
T-Top '86 5.0L LG4 700R4 WS6 Now Bilstein equipped!
T-Top '92 5.0L TBI 700R4
My '86 Firebird Homepage
The F-body Model Kit Pictoral Archive (updated 9/18/00)

There can be only one!!

[This message has been edited by Justins86bird (edited November 16, 2000).]

 

It's a combination of your driving habits and the alignment. Your alignment needs to be set according to your driving habits(not stock). Or, maybe your alignment is just not correct. I would align it every set of tires, especially if they are wearing uneven.


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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

 

All f-bodies wear this area of the tire. As the other guys pointed out, it depends on how serious the wear is- and yours sounds serious. I always get an alignment done when I replace my front tires. The current set's lasted almost 2 years! (I can't rotate my tires, different size on the back.)


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!