I have tried a few different tires and found that 28-30 psi is what I need to run to avoid center tread wear. any less then I get shoulder wear.

Is that with 20s? If yes, what pressure do you run up front?

My 20's style 87s on my E53 I run 40psi front and rear. Car rolls smoothly with no significant tyre wear. May be a bit more of a harsher ride but barely noticeable in my opinion.

How did you arrive as those pressures?

I run 40psi in the rear and 38psi in front. I found that with bad roads that lower psi can result in cracked rims on the lower profile tires.

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My local garage recommended it to me a few years ago on a cayenne I had. Done it ever since. The L320 range rover is also at 40psi all round with no probs.

Thanks for all the replies. I’m going to try the following:

install a set of Hardrace toe and camber arms. I was able to buy them for £320 (about $370) so thought they were worth the likely reduced tire wear

https://i.postimg.cc/qhJ19kJh/346714...-C8-D66-D9.jpg

reduce the rear toe setting to the factory minimum or even a bit less and reduce the rear camber to -2 degrees

stick with factory pressures

check the tire wear every 1000 miles and tweak the above as needed.

So have you already tried with renewed rear arms and rose bushes and the rear camber can't be set near -2 degrees? Camber can be even less a bit depending on the front camber so that there is at least 1 degree more negative camber on the rear compared to front.

This is what you usually find from a low pressure issue. Notice that a low profile tire doesn't show the internal rub wear as much as a standard sidewall..https://uploads.tapatalk-cdn.com/202...fbcd7871a3.jpg

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