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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 11-09-2012, 09:29 AM
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Mein Auto: 750i (F01)
*WARNING* For My 22" Tire Owners...

I've ran 22's for years and I've also used several tire brands: Pirelli, Nitto, Toyo and currently Hankook.
I am very attentive to my rides, maintainence and safety. Monitoring my tire pressure once or twice weekly! These extra low profile tires are impossible to visually tell they are too low or even flat!

So I had been having a slow leak in one of my rears that had no puncture. I initially contributed it to the varying temp changes lately. But decided to take it in to have the tire dipped to see where the leak was coming from. Upon dismount, there was a very obvious issue:
On the very inner side near sidewall, seperation and steel belt was visible.
Even though my tread is in great shape with thousands of miles left! No cupping no camber wear, nada!
The cause.... Weight Load exceeded.
They explained that they see this mostly on large diameter tires on luxury cars like mine. In fact, the air was leaking from there! Get this, the other side was worse!
So I drove back home and promptly installed my stock 19's which are like New. And THIS ladies and gents is exactly why I refuse to sell my stockers on any car I have. Unforseen shyt happens like this and no local shop has 22's on hand typically.
So after investigating weight ratings for these heavy ass cars, you generally want to be in the 100s. My Hankooks were 97. As are most 22s. So be careful and I suggest either jacking your car up or removing tires for a full visual even if the tread looks great! Ironically, fronts were fine. So lesson learned.
Now for frightening pics:
Note the nice tread and then on the inner side... Seperation that could've led to a BLOW-OUT!!!!

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  #2  
Old 11-09-2012, 09:39 AM
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First_745Li First_745Li is offline
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Wow! I'm glad you were lucky enough to catch it before getting a tire blowout.. I wonder what my Toyo tires are....
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Old 11-09-2012, 09:46 AM
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wow bro. yea it is tuff to get to see the inside tread.
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Old 11-09-2012, 10:13 AM
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On another note.... You see how clean the inside of that Vossen is!
Akebono baby!!!

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Old 11-09-2012, 10:26 AM
DriftGirl DriftGirl is offline
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glad u didnt have a blowout with you or your family in the car........

Heres the deal tho: Inside wear on a BMW (tire) is very common because of the suspensions natural camber when the car is lowered. They are brutal on the insides of tires. Best defense is to keep the tire pressure up so that you arent ridin on sidewalls.

other than that...its simply pay 2(2) play.
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Old 11-09-2012, 11:16 AM
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I back up what DriftGirl said its true for German cars to do that.
Thanks for lating others know of this TXSTYLE , I had forgotten to keep up on inspecting my tires.
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  #7  
Old 11-09-2012, 12:24 PM
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I need to check mine too, I been having the same problem with my rear passenger tire always seem to have a slow leak.
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Old 11-09-2012, 12:49 PM
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what is a good air pressure to keep in 22's ?
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  #9  
Old 11-09-2012, 01:20 PM
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i put 44~45 in mine.
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Old 11-09-2012, 02:24 PM
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Quote:
Originally Posted by blue22flames00 View Post
I need to check mine too, I been having the same problem with my rear passenger tire always seem to have a slow leak.


Definitely let us know and post up here buddy. I would NOT be surprised at all.

As far as the negative camber and lowering being the culprit... I say nope. Sure it CAN cause it, but you have seen in my pics just how much tread was left on the inside! Even the shop guys were like, "Man your tires were wearing very evenly considering your setup."
That's because as I've said for years... Run 40psi in these types of setups! I learned this from a custom shop owner back in the early 90's after he went thru much trial and error.
I strongly suggest if you have NOT already and it's been over 6 months since mounting your 22's... Unmount and Inspect.

~ Big Marcus
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Old 11-09-2012, 02:37 PM
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I kept my 22's at around 42 PSI.
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  #12  
Old 11-09-2012, 03:05 PM
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There are a few things going on here that are causing it. Weight limit is one of them.

Basically a tire is meant to ride on it's treaded surface and sometimes a little bit on it's side, IE Camber (to an extent). Typically 1-1.8 degrees of camber is perfectly fine. However go past this and tires can fail pretty badly since the sidewalls aren't designed for that specific duty.

EDIT: Also stretching a tire on a rim it's not designed for can also put a LOT of pressure on the sidewall and the cords that hold the tire together, which it looks like in the first picture!

You said you keep your tires around 40 PSI, this over inflates the center of the tire putting a slight bulge in it. The steel cords have to work harder to make sure the tire stays within it's shape. As well with 40 PSI the pressure can vary a bit, I wouldn't be surprised that the tires get up to 45 PSI when warmed up! This large change in pressure plus the high pressure is putting a large strain on the cord, and as well the rubber surrounding it.

Heavy weight is a huge killer of tires. Remember they are rated to only handle a certain load per tire, and that's under optimal conditions! In this case the OP had a tire with cords that were straining already, and then may have exceeded the weight limit putting even more of a strain on the cords and the surrounding rubber.

Add some driving into the mix and then what you have is the rubber separating from the stressed cord, and then appearing like what the OP posted. Over time this can get worse with the tread/sidewall separating or a blowout!

Last edited by csmeance; 11-09-2012 at 03:35 PM.
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  #13  
Old 11-09-2012, 03:23 PM
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Quote:
Originally Posted by TXSTYLE View Post


Definitely let us know and post up here buddy. I would NOT be surprised at all.

As far as the negative camber and lowering being the culprit... I say nope. Sure it CAN cause it, but you have seen in my pics just how much tread was left on the inside! Even the shop guys were like, "Man your tires were wearing very evenly considering your setup."
That's because as I've said for years... Run 40psi in these types of setups! I learned this from a custom shop owner back in the early 90's after he went thru much trial and error.
I strongly suggest if you have NOT already and it's been over 6 months since mounting your 22's... Unmount and Inspect.

~ Big Marcus
u can say "nope" but its the truth....sorry TXStyle but its not that it CAN...It WILL

If your tire is bad on the inside its simply because you ran it under the needed psi and the associated CAMBER put too much pressure on the inside tire wall. (B) You're runnin too much camber (c) needs an alignment (d) we can rule out defective tire because your other side is worse.

someone saying a tire "looks good" doesnt know tires outside of the tread they see. Its impossible to look at a tire and determine if it has sidewall or internal wire damage...usually caused by running it without the proper tire pressure.

over inflation will wear out the center of the tire.

also, its not good to throw out random PSI numbers...what works for you in your area/conditions may not work for someone that lives across the country in different climates/conditions. Not all manufacturers use the same ratings and recommendations, etc,etc... even model numbers within the same manufacturer will have different characteristics and rating.

blah, blah , blah...etc.

Anywayz, I try to look at the inside of all my ( FALKEN ) tires at least once a year. The cars on air get checked more often because they camber in due to being lowered....My Drift cars just get their tires tossed out.
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  #14  
Old 11-10-2012, 02:41 AM
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+1 to camber. I just had the exact same outcome on my rear tires, and they are appropriate weight rated 20's. outer edge of tires had most of the tread left, the inner edge/shoulder was showing the cords.
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  #15  
Old 11-10-2012, 06:19 AM
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Thats not even on the inside tread, its on the outer sidewall.
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Old 11-10-2012, 12:45 PM
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Quote:
Originally Posted by 1bad540 View Post
Thats not even on the inside tread, its on the outer sidewall.
Bingo! Lol! Not gonna argue or debate on shyt I've been doing for 20yrs (rolling bigger wheels on various cars).
This shyt that happened to my tires is NOT camber or suspension related.
Weight Load Exceeded
In fact, lets keep this thread limited to examples of "weight load" related tire failure to reduce confusion.
Thanks!

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Old 11-10-2012, 01:54 PM
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Quote:
Originally Posted by 1bad540 View Post
Thats not even on the inside tread, its on the outer sidewall.

Quote:
Originally Posted by TXSTYLE View Post
Bingo! Lol! Not gonna argue or debate on shyt I've been doing for 20yrs (rolling bigger wheels on various cars).
This shyt that happened to my tires is NOT camber or suspension related.
Weight Load Exceeded
In fact, lets keep this thread limited to examples of "weight load" related tire failure to reduce confusion.
Thanks!

BigMarcus ~ EVO 4G LTE


uh, thats the inside tire wall...unless youve got 9" deep lips with exposed wheel weights...or just like mounting wheels backwards somehow

Seriously, not trying to argue or debate. YOU posted it because YOU didnt know what was going on with YOUR car. Not nice to take shots at someone who is just trying to help.

20 years of not knowing the difference between the outter and inner wall of a tire?

Good luck to you...
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Old 11-10-2012, 02:13 PM
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How wide are your wheels and what size are the tires?
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Old 11-10-2012, 04:21 PM
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How wide are your wheels and what size are the tires?
10.5 on 295/25/22. Pretty standard setup

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Old 11-10-2012, 06:24 PM
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Glad you found the leak.
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Old 11-10-2012, 06:48 PM
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Glad you found the leak.
Thx bro.

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Old 11-10-2012, 11:33 PM
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Uhoh! I'm sorry to hear that brotha I had the same exact thing happen to me when I was running Hankooks - and that's part of the reason why I switched to the Michelins.

Any plans on what you're going to do? Try a different tire?
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Old 11-10-2012, 11:56 PM
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I think all that is needed to solve this problem with the tire's wearing
out on the inner part so bad is the CAMBER KIT that is made for our
cars ...


http://www.ebay.com/itm/370668315331...84.m1423.l2661
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  #24  
Old 11-11-2012, 12:20 AM
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Quote:
Originally Posted by 1bad540 View Post
wow bro. yea it is tuff to get to see the inside tread.

I thought I would let you know some 1 is using a pic of your
car to try & sell there rims on craigslist ...

http://losangeles.craigslist.org/sfv...384449865.html
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Old 11-11-2012, 06:34 AM
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awesome!! I'll expect at least half of what the rims sell for.
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