[2fast4]

I have the Michelin PS A/S 3 tires front and back. Excellent tires.

Here is the problem...
In the rears, middle section of tire treads are wearing out much faster, while outer side is maybe twice thicker....now you might think I "overinflated" the tires, right? NO! It's 255x3518s wrapping around VMR VB3 wheels.

So I had it up to 38psi before and over time I checked and I see middle area gradually wearing faster, so I deflated to 34psi. But it seems to make little difference. I have OFT and I get on it sometimes but this problem in the middle is concerning me. Low tire pressure means bad MPG. Anyone?

[adiba14]

Share pic maybe? How many miles on the tires.

[jwalker87]

What size are the wheels? Maybe improperly sized tire for the rim?

Also, once you have uneven wear, fixing your tire pressures won't fix it. Now you will wear properly, and everything will wear at the same rate, so you'll still have the middle more worn.

[thomas88162]

Over inflated tires.... Remember that it takes a while for tires to actually show noticeable wear.

[2fast4]

Originally Posted by adiba14

Share pic maybe? How many miles on the tires.

Here are some pics.

[2fast4]

Originally Posted by jwalker87

What size are the wheels? Maybe improperly sized tire for the rim?

Also, once you have uneven wear, fixing your tire pressures won't fix it. Now you will wear properly, and everything will wear at the same rate, so you'll still have the middle more worn.

VMR VB3 rear wheels = 18x9.5". So it is 1" wider than the stock sport rims.

Are you suggesting that 38psi is too high for it?
The manual says 42psi for up to 100mph, or 36psi for over 100mph. So I'm way below the speed.
I emailed the VMR for pressure info and the jerks never replied to me.

Thanks for the the fact that I'm stuck with uneven wear now. No amount of deflation will even out the wear.

[Mutagen]

Check ur tire pressure during the hottest day u drive in.

[2fast4]

Originally Posted by adiba14

Share pic maybe? How many miles on the tires.

Oh ya they have 10k miles on them since 2/2014. It's got warranty of 22.5k miles on the staggered tires(45k miles for non-staggered).

[2fast4]

Originally Posted by thomas88162

Over inflated tires.... Remember that it takes a while for tires to actually show noticeable wear.

It's got to be overinflated tires. I can't think of nothing else.
I really need to find out about the stock size tires on wider VMR VB3 wheels like I have. Front is .5" wider than the stock size, but the rears are full 1" wider.

Anyone have this issues? I need to get to the bottom of this contact patch problem.

[Rickygst]

I had the same problem with my Conti DW and pilot super sports. I ran lower pressure and now I run about 38. I can go through 2 sets of rears before I go through one set of fronts. I think that is just the way it is. Let me know if you have the answer

[2fast4]

Originally Posted by Rickygst

I had the same problem with my Conti DW and pilot super sports. I ran lower pressure and now I run about 38. I can go through 2 sets of rears before I go through one set of fronts. I think that is just the way it is. Let me know if you have the answer

The way it's going, I'm gonna go thru 3 sets rears before the fronts. Fronts tread is about 8/32" while rears are about 3/32".
Do you run wider wheels or stock?
How many miles did your rear tires last?

38psi is definitely too high for my rears. I was on 36psi and still chewing up the middle area.

[Greyfox]

My wife went through a rear set of Michelin's long before the fronts. These were stock 255/40-17 and ran at the recommended tire pressure.

On the flip side, I went through a front set of General's and inside and outside wore completely off even though I was running higher pressure... even checked the alignment twice. Rears were perfect....

That's the main reason I switched my wagon to a square setup running 255's. I can freaking rotate tires now.

[Rickygst]

My wheels are wider. I'm running a 9.5 in the rear. I was running a 10 with the conti dsw. and you are right I will most likely go through 3 sets of rears before replacing the fronts. I got around 12 to 15 thousand miles out of the rear

[2fast4]

Originally Posted by Greyfox

My wife went through a rear set of Michelin's long before the fronts. These were stock 255/40-17 and ran at the recommended tire pressure.

On the flip side, I went through a front set of General's and inside and outside wore completely off even though I was running higher pressure... even checked the alignment twice. Rears were perfect....

That's the main reason I switched my wagon to a square setup running 255's. I can freaking rotate tires now.

Rofl Actually you are one of few that I heard going square setup.

I had Pilot Sport before and it wore enenly. I'm stumped...
I'll stay away from Generals.

[2fast4]

Originally Posted by Rickygst

My wheels are wider. I'm running a 9.5 in the rear. I was running a 10 with the conti dsw. and you are right I will most likely go through 3 sets of rears before replacing the fronts. I got around 12 to 15 thousand miles out of the rear

Thanks for the info. Looks like I'll get about 12k miles on the rears if I'm lucky.
More if it wears evenly but it doesn't look like.
We're you running stock pressure and stock size tires on wide wheels?

[Rickygst]

my current setup is stock size tires and within stock pressure. My Conti were 19 and 265 /30 on the rear

[drewnel22]

Originally Posted by 2fast4

Thanks for the info. Looks like I'll get about 12k miles on the rears if I'm lucky.
More if it wears evenly but it doesn't look like.
We're you running stock pressure and stock size tires on wide wheels?

Keep your pressure down to about 33-34 when you get the new tires. It looks like your tires are too far gone for it to make a huge difference now.

[2fast4]

Originally Posted by 10splaya22

Keep your pressure down to about 33-34 when you get the new tires. It looks like your tires are too far gone for it to make a huge difference now.

OK thanks. I contacted VMR and they recommend BMW specs.
I contacted Michelin and they also recommend BMW specs.
I contact God and he says F* IT!!!

I think it's Michelin's issue. It's a new tire design from scratch. Why FRONTS 225 don't have problem but rear 255 have it???

I don't wanna have these kind of problems in the future and AVOID MICHELIN PS A/S 3 tires. Although they are good gripping tires and pretty decent warranty, it will last a short life like the more sticky PSS because of this. Product defect is what I can come up with....typical of new product design flaw. I lowered it to 34psi and already seeing terrible fuel MPG!!!!!

[cuiter23]

Maybe doing an alignment may help a bit

[drewnel22]

Originally Posted by 2fast4

OK thanks. I contacted VMR and they recommend BMW specs.
I contacted Michelin and they also recommend BMW specs.
I contact God and he says F* IT!!!

I think it's Michelin's issue. It's a new tire design from scratch. Why FRONTS 225 don't have problem but rear 255 have it???

I don't wanna have these kind of problems in the future and AVOID MICHELIN PS A/S 3 tires. Although they are good gripping tires and pretty decent warranty, it will last a short life like the more sticky PSS because of this. Product defect is what I can come up with....typical of new product design flaw. I lowered it to 34psi and already seeing terrible fuel MPG!!!!!

I don't think a 4 psi difference will affect you mpg too much. 34psi is already good and around what BMW recommends.

[2fast4]

Originally Posted by cuiter23

Maybe doing an alignment may help a bit

I had alignment done just before I put these new tires on. Fixed a minor camber on left rear. No more eating up the inner side.

[Jmraza2]

Rear wheel drive will always wear out the rear wheels before the front. Especially if they are over inflated.

Rule of thumb... Stick with 35lbs