kimseongjae62

Thanks for the reply smooth1.
I though the camber was a suspect too at first and your explanation of feather wear symptom is a logical one.
Another reason that I found to have similar wear patterns were bad shocks/struts. However, I would think that bad shocks would produce more irregular balding patterns. As the car is in sitting position, the rear wheel visibly looks to be sagging- bottom of the wheels being wider. However, I was told that the rear wheel camber is not adjustable. Is this true with LS models? Also, was told that when the car is in motion, the camber sagging position is corrected to a more upright position. I really don't know what to do. when you say sagging suspension, which suspension part is suspect?
-shock/struts?- I believe fronts are strut and rear is a coil over shocks. Aside from better handling from a HD/Sports suspension, would a beefier suspension raise the car elevation and thus reversing the sagging camber position/problem?
-suspension bushings?
Provided that it is not a suspension problem, the alignment scale has a min. and a max. allowable factory setting range. Would setting the toe and the camber settings to a factory minimum help?

I have a 07, LS460 and experiencing the same extreme inside tire wear problem on all 4 tires. The rear tires are worse. maybe due to it being a RWD.
Symptom:
Extreme tire wear on the inside- just 1" from the inside tread only- consistent 1" extreme wear all the way around the wheel. No wear on the outside of the wheel what so ever. Almost brand new. It's not a gradual wear from the inside. It's a extreme difference in abnormal inside wear to the point the insides are exposed. I have to replace all 4 tires prematurely for safety. The first OEM ( Dunlop) set of tire were not perfectly worn but not this extreme. This second set was replaced at 33K miles with Kumho Ecsta Platinum LX. AFTER THE NEW TIRES WERE INSTALLED, I took it to a dealer for proper alignment in order to maximize wear. At that time, I was told the car was already in alignment to proper factory specs.
At first I thought the irregular wear was caused by low air pressure and was told it was not the cause. The replacement tire had the same size spec to -.1" dia. from the OEM tire.
I went to the dealer today prior to getting the tire replaced to get some answers. The dealer looked at it and told me I needed 4 new tires as if i didn't know. So, I said what is the problem??? The dealer recommended me to replace the tires and get an alignment- then they could look into it more. I told them that I spend $180 for an alignment when I got the tires last time. To make the long story short, dealer could not guaranty their work even if I was willing to spend the money to get to the bottom of the problem. They had no answer.
After some research, I am finding that it may be a toe out alignment spec. on these cars from the factory in order to gain better handling. This information was confirmed by the service advisor who was familiar with this problem (but did not admit to it) more so with IS series than than the LS due to higher demand for handling. Is this true? I've thought it was the camber setting. However, the camber setting cannot be changed on the rear wheels on the LS.

Prior to this, I had the same issue with my 05 Toyota Prius. I am beginning to think this may be a Toyota problem in general.

So, is it the toe out setting that's causing this problem?
Is this a gradual progression of alignment problem causing the tire to wear more irregular as time passes? The car not able to hold alignment setting over a period?
I don't think it's attributed to a warn out suspension parts since the dealer inspected the car today on the rack.
Any help to resolve this problem would be greatly appreciated.

Just out of curiosity, for what reason do you want to change it. Especially on rear drive wheel. Is it due to tire wear on the inside?

My LS OEM tire was Dunlop. Currently, I am running on Kumho, Ecsta Platinum LX after extensive research about 35K miles ago in terms of customer review, survey, but more importantly how it was compared to oem tire specifications. I Highly recommended tire at $100 per tire less.

Firmer yet same smooth ride
60K warranty
good handling on dry and wet with good cornering.
Had it installed for $165/ea. +tax ( incl. disposal, mount and balance)
Can't beat it when the OEMs were going for $280 +tax w/o mount and balance at Tirerack and even higher at the dealer. Even at the same price, I would chose Kumho due to better wear.

Considering he Dunlops were replaced at 30K with little tread left, I still have about 1/2 the tread left on the tires. I believe the tire had 80K Warr. when it came out new about 3 years ago. Now, they have adjusted it to 60K. However, depending on where you live, road and riving condition, one can expect to get over 60K easily.

My LS OEM tire was Dunlop. Currently, I am running on Kumho, Ecsta Platinum LX after extensive research about 35K miles ago in terms of customer review, survey, but more importantly how it was compared to oem tire specifications. I Highly recommended tire at $100 per tire less.

Firmer yet same smooth ride
60K warranty
good handling on dry and wet with good cornering.
Had it installed for $165/ea. +tax ( incl. disposal, mount and balance)
Can't beat it when the OEMs were going for $280 +tax w/o mount and balance at Tirerack and even higher at the dealer. Even at the same price, I would chose Kumho due to better wear.

Considering he Dunlops were replaced at 30K with little tread left, I still have about 1/2 the tread left on the tires. I believe the tire had 80K Warr. when it came out new about 3 years ago. Now, they have adjusted it to 60K. However, depending on where you live, road and riving condition, one can expect to get over 60K easily.