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I found the secret why BMW 19inch 326 wheels crack!

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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dario
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I found the secret why BMW 19inch 326 wheels crack!

Post by dario » Wed Mar 15, 2017 10:38 am

I doubt that the rims are any different to be honest, other than the BBS rim having move bead area and shoulder than the originals.

In addition given that there are photos on the web of failed RFT tyres that have only the sidewall in place.

Do you have any empirical information on this or is it just a hunch?

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Smartbear
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I found the secret why BMW 19inch 326 wheels crack!

Post by Smartbear » Wed Mar 15, 2017 11:07 am

dario wrote:I doubt that the rims are any different to be honest, other than the BBS rim having move bead area and shoulder than the originals.

In addition given that there are photos on the web of failed RFT tyres that have only the sidewall in place.

Do you have any empirical information on this or is it just a hunch?
There is a difference between normal wheels & wheels designed for runflat tyres
http://www.e90post.com/forums/showthread.php?t=7831
As I mentioned, it's to keep the runflat tyre in place on the rim after it's deflated :thumbsup:
Rob
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Number5
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I found the secret why BMW 19inch 326 wheels crack!

Post by Number5 » Wed Mar 15, 2017 1:14 pm

Dario
Do you have 326's on your 5 series ?
I have on my last 2 F11's and haven't had any issues over 5 years with them.
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mr wilks
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I found the secret why BMW 19inch 326 wheels crack!

Post by mr wilks » Wed Mar 15, 2017 2:03 pm

Number5 wrote:Dario
Do you have 326's on your 5 series ?
I have on my last 2 F11's and haven't had any issues over 5 years with them.
Different sized tyres on 5s though :wink: far more sensible profiles :oops:
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dario
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I found the secret why BMW 19inch 326 wheels crack!

Post by dario » Wed Mar 15, 2017 7:58 pm

Number5 wrote:Dario
Do you have 326's on your 5 series ?
I have on my last 2 F11's and haven't had any issues over 5 years with them.
No the GT has some other wheel which i don't know the number of. Pic included.
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I found the secret why BMW 19inch 326 wheels crack!

Post by dario » Wed Mar 15, 2017 8:10 pm

Smartbear wrote:
dario wrote:I doubt that the rims are any different to be honest, other than the BBS rim having move bead area and shoulder than the originals.

In addition given that there are photos on the web of failed RFT tyres that have only the sidewall in place.

Do you have any empirical information on this or is it just a hunch?
There is a difference between normal wheels & wheels designed for runflat tyres
http://www.e90post.com/forums/showthread.php?t=7831
As I mentioned, it's to keep the runflat tyre in place on the rim after it's deflated :thumbsup:
Rob
answering your question. The large Alloy wheel dealer in the UK also offers these wheels fitted with the RE050A RFT tyre as an option. I have now written to BBS to get a definitive statement from the regarding the use of their wheels and RFT tyres. Once i have this info, i will revert.

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