Stu makes some very good points and is right on. There are a number of
brands of tires that will only give you 4,000 to 5,000 miles on the rear of
a 911.
----- Original Message -----
From: "Stu Hamilton" <Stu.Hamil
...@Comcast.net>
To: <IRPCA@googlegroups.com>
Sent: Sunday, June 28, 2009 3:46 PM
Subject: RE: Alignment problems 996 Targa
> There are a couple things that could be a problem.
> First, the type of tire. While most tires will get 10,000-12,000 miles on
> the rear of the later 911s (1995 and newer - with the LSA rear subframe) -
> some brands are known to get MUCH less. If you are using Pirelli
> P-Zero's,
> that is the problem - I think 4,000 is about average. Consider a switch
> to
> something else (Bridgestone, Michelin - check the Tire Rack reviews).
> Second, the LSA subframe is very complex. If it has ever been damaged, it
> can be hard to get right again. If you can, get the car up on a lift, and
> inspect all of the control arms (5 on each side), and compare them
> side-to-side. Pay particular attention to bushings, as any worn/damaged
> bushing may allow enough play so that it appears normal on the alignment
> rack, but gives you too much toe (out) on the road. I assume if you have
> been to the dealer, they used a true 4-wheel alignment machine - that is
> critical.
> If you have had it aligned twice, I imagine that the camber was checked.
> It
> may have too much camber (top of the wheels leaning in). This situation
> could be aggravated if the car has been lowered. Taking some out would
> help
> the tire wear, but would be at the expense of cornering performance.
> If your tires are symmetrical, you could also swap them left to right.
> That
> won't help you fix the problem, but will make your tires last longer.
> Stu Hamilton
> -----Original Message-----
> From: IRPCA@googlegroups.com [mailto:IRPCA@googlegroups.com] On Behalf Of
> Porsche Club
> Sent: Saturday, June 27, 2009 10:20 AM
> To: IRPCA
> Subject: Alignment problems 996 Targa
> I continue to have alignment problems with my Targa and going through
> rear tires every 4,000 miles. Undue tread wear on the inside of the
> tires.
> Suggestions on where to go to have this looked at. The dealer and
> Burt Brothers in Park City have done previous four wheel alignments to
> no avail.
> Thanks,
> Dave
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