Lotta hot air 👍

[Rootripper]

Talk about a noncommittal, not responsible door decal. Maybe it’s me, but that chart makes about as much sense a a barcode at Whole Foods.
The mechanic that’s bee working on my E53 has developed a penchant for giving my X back to me with 38 lbs (cold) all around. Rides like a luxury buckboard, beware anything resembling a bump. I think I can even feel changes in pavement color 🤪
I always ran 32 lbs front, 34 lbs rear and seemed to work well.
Anyone have some advice ? Thanks up front
Mike

[andrewwynn]

Start with the door suggestion and fine tune usually based on tire wear.

32/39 works pretty good for me but may start adding a couple psi front to get more even wear up front.

It's one of my big annoyance that car repair places can't seem to read the door jamb and over inflate tires.

Loved the line about feel the color

[Rootripper]

Thanks Andrew.
I also have interesting tire wear issues due to funky camber on rear axle. That and the fact I bought Michelin Cross Climate rubber. Diresctional tread pattern. O well.
Thanks for your help
Mike

[Rootripper]

My mechanic says correcting the bad angle can be expensive. Entire suspension components need replacement. Was he pulling my leg ?

[Fifty150hs]

Originally Posted by Rootripper

My mechanic says correcting the bad angle can be expensive. Entire suspension components need replacement. Was he pulling my leg ?

I had similar problem. Alignment shop couldn't get the rear camber into spec. Idiots were telling me shocks must be bad and sagging. Say whaaaa? Anyway, I suspected bad rear ball joints from researching this forum. Changed them and lo and behold my "bad shocks" weren't "bad" anymore and another, competent alignment shop easily brought the rear camber into spec.

[andrewwynn]

Camber not usually the cause of inside edge wear it's loose ball joints. I have the problem and will be documenting soon as I'm rapidly destroying my current set of tires and the replacement set it's in the shipping cart waiting for my taxes to pull the trigger.

[Rootripper]

Andrew;
What’s the relationship between inflation pressure and tire wear ?
Mike

[Bdc101]

Originally Posted by Rootripper

Andrew;
What’s the relationship between inflation pressure and tire wear ?
Mike

If you over-inflate, more of the car's weight will be on the center of the tread (the area supported by the air pressure inside the tire), and you'll wear that out faster.



If you under-inflate, more of the car's weight will be on the edges of the tire (the area supported by the stiffness of the sidewalls), and the edges will wear out faster.



Ideally you will want as close to even pressure on the ground throughout the entire contact patch (the area that the tire contacts the ground). This will get you maximum traction when cornering or accelerating.



Unless the problem is extreme, you usually have to measure the tread depth to compare the edges and the center. If you notice one wearing faster than the other you can add or remove pressure to try to get a bit more life out of the tire.

[andrewwynn]

From my understanding two joints are primarily responsible for rear tire wear and it's not about camber it's abiut the tire steering under load in corners. I'll be confirming when I fix mine before installing $1000 of tires

[crystalworks]

I enjoy being able to read braille on the pavement. 36psi cold all 4 corners on all vehicles.

Count yourself lucky your indy cares enough to inflate your tires. Most will let you leave with anything above 15psi.